21813 (number)

21813 is an odd 5-digits composite number following 21812 and preceding 21814. In scientific notation, it is written as 2.1813 × 10^4. The sum of its digits is 15. It has a total of 3 prime factors and 8 positive divisors. There are 13200 positive integers (up to 21813) that are relatively prime to 21813.

Interesting facts

Basic properties

Name

Name twenty-one thousand eight hundred thirteen

Notation

Scientific notation 2.1813 × 10^4
Engineering notation 2.1813 × 10^3

Prime Factorization of 21813

Prime Factorization 3 × 11 × 661

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 21813
Product of the distinct prime numbers

The prime factorization of 21813 is 3 × 11 × 661. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 6, 21, 58, 45, 21, 4128, 587, 10780, 17155, 179555, 459783, 9355804, 6296314, 32478055, 10697444, 61499306, 795693795, 3160719022, 5017884677

Basic calculations (n = 21813)

Multiplication

n×y
n×2 43626
n×3 65439
n×4 87252
n×5 109065

Division

n÷y
n÷2 10906.5
n÷3 7271
n÷3 5453.25
n÷5 4362.6

Exponentiation

ny
n2 475806969
n3 10378777414797
n4 226392271748966961
n5 4.9382946236602E+21

Nth Root

y√n
2√n 147.69224759614
3√n 27.940776182414
4√n 12.152869932495
5√n 7.3746782950452

Divisors of 21813

1, 3, 11, 33, 661, 1983, 7271, 21813

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21812
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21813 can be divided by 8 positive divisors. The sum of these divisors (counting 21813) is 1, the average is 0.125.

Base conversion 21813

Base System Value
2 Binary 101010100110101
3 Ternary 1002220220
4 Quaternary 11110311
5 Quinary 1144223
6 Senary 244553
8 Octal 52465
10 Decimal 21813
12 Duodecimal 10759
16 Hexadecimal 5535
20 Vigesimal 2ead
36 Base36 gtx

Cryptographic Hash Functions

md5 2fae3af07a8228d1d41c509494c4b461
sha1 3b651a1dfeada9ef689812fb306e64f19c172ad9
sha256 8f458a6b455b54b6304af15bc9bd91cf72c31c9360dff4b77886d41d5114fb3f
sha512 564906074665f14635492411578e478a396c3a2e5489e96f99e8592d4585c244ebb55b47ddccac7cdedaf9c05e720101c19070cebec833136ca090293ae33f8b
ripemd-160 ba1e55e87bc77cad42460a5b51a03b5fcebfe174

21813 as geometric shapes

Circle

Radius = n
Diameter 43626
Circumference 137055.12110551
Area 1494791678.3372

Sphere

Radius = n
Volume 43474521172760
Surface area 5979166713.3489
Circumference 137055.12110551

Square

Length = n
Perimeter 87252
Area 475806969
Diagonal 30848.240436044

Cube

Length = n
Surface area 2854841814
Volume 10378777414797
Space diagonal 37781.2242655

Equilateral Triangle

Length = n
Perimeter 65439
Area 206030461.22584
Altitude 18890.61213275

Triangular Pyramid

Length = n
Surface area 206030461.22584
Volume 1223150648404.8
Height 10282.746812015