21681805 (number)

21681805 is an odd 8-digits composite number following 21681804 and preceding 21681806. In scientific notation, it is written as 2.1681805 × 10^7. The sum of its digits is 31. It has a total of 4 prime factors and 16 positive divisors. There are 16863232 positive integers (up to 21681805) that are relatively prime to 21681805.

Interesting facts

Basic properties

Name

Name twenty-one million six hundred eighty-one thousand eight hundred five

Notation

Scientific notation 2.1681805 × 10^7
Engineering notation 2.1681805 × 10^6

Prime Factorization of 21681805

Prime Factorization 5 × 47 × 257 × 359

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21681805
Product of the distinct prime numbers

The prime factorization of 21681805 is 5 × 47 × 257 × 359. Since it has a total of 4 prime factors.

Most popular turbo-numbers

4, 2, 86, 18, 4, 414, 6530, 7774, 30419, 18548, 71125, 391186, 483249, 3353434, 38217927, 74353083, 759343636, 734046181, 259732000, 813229472

Basic calculations (n = 21681805)

Multiplication

n×y
n×2 43363610
n×3 65045415
n×4 86727220
n×5 108409025

Division

n÷y
n÷2 10840902.5
n÷3 7227268.3333333
n÷3 5420451.25
n÷5 4336361

Exponentiation

ny
n2 470100668058025
n3 1.0192631015204E+22
n4 2.209946381086E+29
n5 4.7915626495163E+36

Nth Root

y√n
2√n 4656.3725151667
3√n 278.84646597239
4√n 68.237618035558
5√n 29.323721544846

Divisors of 21681805

1, 5, 47, 235, 257, 359, 1285, 1795, 12079, 16873, 60395, 84365, 92263, 461315, 4336361, 21681805

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 -21681804
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 21681805 can be divided by 16 positive divisors. The sum of these divisors (counting 21681805) is 1, the average is 0.0625.

Base conversion 21681805

Base System Value
2 Binary 1010010101101011010001101
3 Ternary 1111210112211211
4 Quaternary 1102231122031
5 Quinary 21022304210
6 Senary 2052414421
8 Octal 122553215
10 Decimal 21681805
12 Duodecimal 7317411
16 Hexadecimal 14ad68d
20 Vigesimal 6fa4a5
36 Base36 cwpsd

Cryptographic Hash Functions

md5 7bfed6c616e7f7de563912bcb420ba2b
sha1 7809f09b589b91e1aa4d3548eb6beeb75f4dd450
sha256 6d104e28ba9cc2f6903c901e0f8f0dfc033cea7c890f86a80102328f180a28e6
sha512 519468a3b73f7d518435d3dc3d97f947d9cf474e74143ff627d5872c99c3d36e82f5a6f5dae3d5146fc868c33f434a909e2e203fb19045a51ed9714a6316cbda
ripemd-160 303700bce97356d03c3c76f688d8f4a1670d8542

21681805 as geometric shapes

Circle

Radius = n
Diameter 43363610
Circumference 136230798.60913
Area 1.4768648052187E+15

Sphere

Radius = n
Volume 4.2694792957488E+22
Surface area 5.907459220875E+15
Circumference 136230798.60913

Square

Length = n
Perimeter 86727220
Area 470100668058025
Diagonal 30662702.687729

Cube

Length = n
Surface area 2820604008348150
Volume 1.0192631015204E+22
Space diagonal 37553987.859801

Equilateral Triangle

Length = n
Perimeter 65045415
Area 2.0355956043714E+14
Altitude 18776993.9299

Triangular Pyramid

Length = n
Surface area 2.0355956043714E+14
Volume 1.2012130848305E+21
Height 10220900.89591