21391856 (number)

21391856 is an even 8-digits composite number following 21391855 and preceding 21391857. In scientific notation, it is written as 2.1391856 × 10^7. The sum of its digits is 35. It has a total of 6 prime factors and 20 positive divisors. There are 10662336 positive integers (up to 21391856) that are relatively prime to 21391856.

Interesting facts

Basic properties

Name

Name twenty-one million three hundred ninety-one thousand eight hundred fifty-six

Notation

Scientific notation 2.1391856 × 10^7
Engineering notation 2.1391856 × 10^6

Prime Factorization of 21391856

Prime Factorization 2 × 2 × 2 × 2 × 347 × 3853

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 2673982
Product of the distinct prime numbers

The prime factorization of 21391856 is 2 × 2 × 2 × 2 × 347 × 3853. Since it has a total of 6 prime factors.

Most popular turbo-numbers

6, 1, 73, 68, 343, 363, 4789, 9759, 47633, 45346, 618437, 392323, 542571, 7595557, 28157191, 35432111, 894839135, 150671816, 9668687504, 6565143694

Basic calculations (n = 21391856)

Multiplication

n×y
n×2 42783712
n×3 64175568
n×4 85567424
n×5 106959280

Division

n÷y
n÷2 10695928
n÷3 7130618.6666667
n÷3 5347964
n÷5 4278371.2

Exponentiation

ny
n2 457611503124736
n3 9.7891593787879E+21
n4 2.0940828779208E+29
n5 4.4796319376547E+36

Nth Root

y√n
2√n 4625.1330791665
3√n 277.59788663137
4√n 68.00833095413
5√n 29.244869873714

Divisors of 21391856

1, 2, 4, 8, 16, 347, 694, 1388, 2776, 3853, 5552, 7706, 15412, 30824, 61648, 1336991, 2673982, 5347964, 10695928, 21391856

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 -21391855
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 21391856 can be divided by 20 positive divisors. The sum of these divisors (counting 21391856) is 1, the average is 0.05.

Base conversion 21391856

Base System Value
2 Binary 1010001100110100111110000
3 Ternary 1111020211002222
4 Quaternary 1101212213300
5 Quinary 20434014411
6 Senary 2042300212
8 Octal 121464760
10 Decimal 21391856
12 Duodecimal 71b7668
16 Hexadecimal 14669f0
20 Vigesimal 6ddjcg
36 Base36 cqi28

Cryptographic Hash Functions

md5 69b824876be9de60ca61bea8e011cf72
sha1 eb15ed30e7b367b882413336e9cc77e9f5f6c441
sha256 41763da90420f4b46e2589f7e9f0bd37381196112d66041d65145fb9393204f5
sha512 8059518a5415e266f356011bf5abe21a96f2644e15736fe8b236f676440ee5a3e804f6274cdb87c771d93759c049d23df1630c55297735318d60a6d589471eec
ripemd-160 1950c8c7dca8e4acb53024f0b726192d610d57c2

21391856 as geometric shapes

Circle

Radius = n
Diameter 42783712
Circumference 134408995.3125
Area 1.4376289364149E+15

Sphere

Radius = n
Volume 4.100473491896E+22
Surface area 5.7505157456594E+15
Circumference 134408995.3125

Square

Length = n
Perimeter 85567424
Area 457611503124736
Diagonal 30252652.879532

Cube

Length = n
Surface area 2745669018748416
Volume 9.7891593787879E+21
Space diagonal 37051781.460197

Equilateral Triangle

Length = n
Perimeter 64175568
Area 1.98151593385E+14
Altitude 18525890.730099

Triangular Pyramid

Length = n
Surface area 1.98151593385E+14
Volume 1.1536634964761E+21
Height 10084217.626511