21381808 (number)

21381808 is an even 8-digits composite number following 21381807 and preceding 21381809. In scientific notation, it is written as 2.1381808 × 10^7. The sum of its digits is 31. It has a total of 6 prime factors and 20 positive divisors. There are 9163584 positive integers (up to 21381808) that are relatively prime to 21381808.

Interesting facts

Basic properties

Name

Name twenty-one million three hundred eighty-one thousand eight hundred eight

Notation

Scientific notation 2.1381808 × 10^7
Engineering notation 2.1381808 × 10^6

Prime Factorization of 21381808

Prime Factorization 2 × 2 × 2 × 2 × 7 × 190909

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 2672726
Product of the distinct prime numbers

The prime factorization of 21381808 is 2 × 2 × 2 × 2 × 7 × 190909. Since it has a total of 6 prime factors.

Most popular turbo-numbers

1, 5, 76, 92, 432, 699, 9241, 2922, 78897, 33017, 703002, 767635, 1465639, 7804150, 6917185, 44636077, 65712210, 826802501, 5454491101, 2986142487

Basic calculations (n = 21381808)

Multiplication

n×y
n×2 42763616
n×3 64145424
n×4 85527232
n×5 106909040

Division

n÷y
n÷2 10690904
n÷3 7127269.3333333
n÷3 5345452
n÷5 4276361.6

Exponentiation

ny
n2 457181713348864
n3 9.7753716159364E+21
n4 2.090151190206E+29
n5 4.4691211439957E+36

Nth Root

y√n
2√n 4624.0467125668
3√n 277.55441618789
4√n 68.000343473889
5√n 29.242122027258

Divisors of 21381808

1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 190909, 381818, 763636, 1336363, 1527272, 2672726, 3054544, 5345452, 10690904, 21381808

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21381807
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21381808 can be divided by 20 positive divisors. The sum of these divisors (counting 21381808) is 1, the average is 0.05.

Base conversion 21381808

Base System Value
2 Binary 1010001100100001010110000
3 Ternary 1111020022022211
4 Quaternary 1101210022300
5 Quinary 20433204213
6 Senary 2042141504
8 Octal 121441260
10 Decimal 21381808
12 Duodecimal 71b1894
16 Hexadecimal 14642b0
20 Vigesimal 6dcea8
36 Base36 cqab4

Cryptographic Hash Functions

md5 01ccc14bcfc295249f77e7f3bbbb1004
sha1 9476d783a58c0b970beaa310c94421431b54df9d
sha256 3f1896ef16cfa2d56d1dbba76b3777d682b66b455f928e4db540286eaf83aaa2
sha512 346c59ac82166b250f8934246e51ea3ea324a58fb4dcbb97b13916d05b8b958c14f30d6fdb055d8915618760c03d22fa99f117d49ea39cf7b88fcc0dece16a0d
ripemd-160 f8f5cad19dc6334b6c0f38e3c271fa2b1afe4255

21381808 as geometric shapes

Circle

Radius = n
Diameter 42763616
Circumference 134345861.86653
Area 1.4362787120124E+15

Sphere

Radius = n
Volume 4.0946980872981E+22
Surface area 5.7451148480495E+15
Circumference 134345861.86653

Square

Length = n
Perimeter 85527232
Area 457181713348864
Diagonal 30238442.861658

Cube

Length = n
Surface area 2743090280093184
Volume 9.7753716159364E+21
Space diagonal 37034377.813683

Equilateral Triangle

Length = n
Perimeter 64145424
Area 1.9796548895291E+14
Altitude 18517188.906841

Triangular Pyramid

Length = n
Surface area 1.9796548895291E+14
Volume 1.1520385930412E+21
Height 10079480.953886