21005816 (number)

21005816 is an even 8-digits composite number following 21005815 and preceding 21005817. In scientific notation, it is written as 2.1005816 × 10^7. The sum of its digits is 23. It has a total of 5 prime factors and 16 positive divisors. There are 9694944 positive integers (up to 21005816) that are relatively prime to 21005816.

Interesting facts

Basic properties

Name

Name twenty-one million five thousand eight hundred sixteen

Notation

Scientific notation 2.1005816 × 10^7
Engineering notation 2.1005816 × 10^6

Prime Factorization of 21005816

Prime Factorization 2 × 2 × 2 × 13 × 201979

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 5251454
Product of the distinct prime numbers

The prime factorization of 21005816 is 2 × 2 × 2 × 13 × 201979. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 9, 54, 15, 961, 254, 6678, 803, 63865, 99945, 784357, 577291, 6146493, 3824604, 67583999, 91672767, 69543401, 775466111, 8126929964, 2992605726

Basic calculations (n = 21005816)

Multiplication

n×y
n×2 42011632
n×3 63017448
n×4 84023264
n×5 105029080

Division

n÷y
n÷2 10502908
n÷3 7001938.6666667
n÷3 5251454
n÷5 4201163.2

Exponentiation

ny
n2 441244305825856
n3 9.2686966992257E+21
n4 1.9469653742374E+29
n5 4.0897596409602E+36

Nth Root

y√n
2√n 4583.2102286498
3√n 275.91788497449
4√n 67.699410844185
5√n 29.138548315683

Divisors of 21005816

1, 2, 4, 8, 13, 26, 52, 104, 201979, 403958, 807916, 1615832, 2625727, 5251454, 10502908, 21005816

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21005815
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21005816 can be divided by 16 positive divisors. The sum of these divisors (counting 21005816) is 1, the average is 0.0625.

Base conversion 21005816

Base System Value
2 Binary 1010000001000010111111000
3 Ternary 1110112012120012
4 Quaternary 1100020113320
5 Quinary 20334141231
6 Senary 2030121052
8 Octal 120102770
10 Decimal 21005816
12 Duodecimal 7050188
16 Hexadecimal 14085f8
20 Vigesimal 6b5eag
36 Base36 ci86w

Cryptographic Hash Functions

md5 a2cfc6db6b1f157b053d19ec18401926
sha1 0d95cb0a3a4f0e49e12bf1f76a9ef06ee51ebe1a
sha256 697c8b5c8c8d76c88699f47ec51d6db94ce3106bf2b9135bf905fa4910fceae4
sha512 9ca17fed2a5d386b0efb54615feca0e1a6a2c5d7f3c7c3bec20c1eac6e966626bd2a6b75af86e578d9ad5846a763a8eb9270c7f915d08ecf6604a0f11bd31c59
ripemd-160 758e4c1d97956ab5a254b41981ffd08084a8450c

21005816 as geometric shapes

Circle

Radius = n
Diameter 42011632
Circumference 131983434.45652
Area 1.3862098696208E+15

Sphere

Radius = n
Volume 3.8824625944852E+22
Surface area 5.5448394784833E+15
Circumference 131983434.45652

Square

Length = n
Perimeter 84023264
Area 441244305825856
Diagonal 29706709.875914

Cube

Length = n
Surface area 2647465834955136
Volume 9.2686966992257E+21
Space diagonal 36383140.566443

Equilateral Triangle

Length = n
Perimeter 63017448
Area 1.9106438906021E+14
Altitude 18191570.283222

Triangular Pyramid

Length = n
Surface area 1.9106438906021E+14
Volume 1.092326381464E+21
Height 9902236.6253046