21827 (number)
21,827 (twentyone thousand eight hundred twentyseven) is an odd fivedigits composite number following 21826 and preceding 21828. In scientific notation, it is written as 2.1827 × 10^{4}. The sum of its digits is 20. It has a total of 3 prime factors and 8 positive divisors. There are 19,008 positive integers (up to 21827) that are relatively prime to 21827.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 5
 Sum of Digits 20
 Digital Root 2
Name
Short name  21 thousand 827 

Full name  twentyone thousand eight hundred twentyseven 
Notation
Scientific notation  2.1827 × 10^{4} 

Engineering notation  21.827 × 10^{3} 
Prime Factorization of 21827
Prime Factorization 13 × 23 × 73
Composite numberω(n)  Distinct Factors  3  Total number of distinct prime factors 

Ω(n)  Total Factors  3  Total number of prime factors 
rad(n)  Radical  21827  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  1  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 21,827 is 13 × 23 × 73. Since it has a total of 3 prime factors, 21,827 is a composite number.
Divisors of 21827
8 divisors
τ(n)  Total Divisors  8  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  24864  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  3037  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  3108  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  147.73963584631  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  7.0228442728443  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 21,827 can be divided by 8 positive divisors (out of which 0 are even, and 8 are odd). The sum of these divisors (counting 21,827) is 24,864, the average is 3,108.
Other Arithmetic Functions (n = 21827)
φ(n)  Euler Totient  19008  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  792  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 2449  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 19,008 positive integers (less than 21,827) that are coprime with 21,827. And there are approximately 2,449 prime numbers less than or equal to 21,827.
Divisibility of 21827
m  2  3  4  5  6  7  8  9 

n mod m  1  2  3  2  5  1  3  2 
21,827 is not divisible by any number less than or equal to 9.
Classification of 21827
By Arithmetic functions
 Arithmetic
 Deficient
Expressible via specific sums
 Polite
By Powers
 Square Free
Other numbers
 LucasCarmichael
 Sphenic
Base conversion (21827)
Base  System  Value 

2  Binary  101010101000011 
3  Ternary  1002221102 
4  Quaternary  11111003 
5  Quinary  1144302 
6  Senary  245015 
8  Octal  52503 
10  Decimal  21827 
12  Duodecimal  1076b 
16  Hexadecimal  5543 
20  Vigesimal  2eb7 
36  Base36  gub 
Basic calculations (n = 21827)
Multiplication
n×yn×2  43654 

n×3  65481 
n×4  87308 
n×5  109135 
Division
n÷yn÷2  10913.500 

n÷3  7275.666 
n÷4  5456.750 
n÷5  4365.400 
Exponentiation
n^{y}n^{2}  476417929 

n^{3}  10398774136283 
n^{4}  226974043072649041 
n^{5}  4954162438146710617907 
Nth Root
^{y}√n^{2}√n  147.73963584631 

^{3}√n  27.946752545277 
^{4}√n  12.15481944935 
^{5}√n  7.3756246939849 
21827 as geometric shapes
Circle
Radius = nDiameter  43654 

Circumference  137143.08569981 
Area  1496711065.7849 
Sphere
Radius = nVolume  43558283243848 

Surface area  5986844263.1395 
Circumference  137143.08569981 
Square
Length = nPerimeter  87308 

Area  476417929 
Diagonal  30868.039425918 
Cube
Length = nSurface area  2858507574 

Volume  10398774136283 
Space diagonal  37805.472976806 
Equilateral Triangle
Length = nPerimeter  65481 

Area  206295014.66619 
Altitude  18902.736488403 
Triangular Pyramid
Length = nSurface area  825180058.66474 

Volume  1225507284632.2 
Height  17821.670871909 
Cryptographic Hash Functions
md5  0147fa9611db0b7cd706139ae2170494 

sha1  313e6350a366ba46c2d34905d7a7055d29162965 
sha256  4053d3e014ff0120ec1c227ca152737cb21a7c9d4311e570d0d6c1783da7c73c 
sha512  bd906352b4ddac94238b2d1b21717d482de6a210e124dd1f9dab0df1c53f5ecd90801406bb7b68cff80d9412ff66ce0f85adcbd1070c6dc791c96a2acdf20909 
ripemd160  b66f7d5c5974ea24b82c1308538836f3c68a8147 