20138781 (number)

20138781 is an odd 8-digits composite number following 20138780 and preceding 20138782. In scientific notation, it is written as 2.0138781 × 10^7. The sum of its digits is 30. It has a total of 3 prime factors and 8 positive divisors. There are 12158016 positive integers (up to 20138781) that are relatively prime to 20138781.

Interesting facts

Basic properties

Name

Name twenty million one hundred thirty-eight thousand seven hundred eighty-one

Notation

Scientific notation 2.0138781 × 10^7
Engineering notation 2.0138781 × 10^6

Prime Factorization of 20138781

Prime Factorization 159 × 13 × 9743

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 20138781
Product of the distinct prime numbers

The prime factorization of 20138781 is 159 × 13 × 9743. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 8, 62, 100, 8, 573, 8583, 1418, 62575, 34021, 275415, 920185, 5872665, 8617806, 83722480, 98784090, 547730502, 918827213, 9594762380, 1073927076

Basic calculations (n = 20138781)

Multiplication

n×y
n×2 40277562
n×3 60416343
n×4 80555124
n×5 100693905

Division

n÷y
n÷2 10069390.5
n÷3 6712927
n÷3 5034695.25
n÷5 4027756.2

Exponentiation

ny
n2 405570500165961
n3 8.1676954829028E+21
n4 1.6448743060487E+29
n5 3.3125763422041E+36

Nth Root

y√n
2√n 4487.6253185844
3√n 272.0681643249
4√n 66.989740397948
5√n 28.893931299229

Divisors of 20138781

1, 13, 159, 2067, 9743, 126659, 1549137, 20138781

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 -20138780
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 20138781 can be divided by 8 positive divisors. The sum of these divisors (counting 20138781) is 1, the average is 0.125.

Base conversion 20138781

Base System Value
2 Binary 1001100110100101100011101
3 Ternary 1101220011012210
4 Quaternary 1030310230131
5 Quinary 20123420111
6 Senary 1555351033
8 Octal 114645435
10 Decimal 20138781
12 Duodecimal 68b2479
16 Hexadecimal 1334b1d
20 Vigesimal 65h6j1
36 Base36 bzn6l

Cryptographic Hash Functions

md5 a52ac4cdec866fec7b9396371844d910
sha1 8c86ca2d49e815c78751b7ed3afad2a6cccab4a0
sha256 60d1f4fd17ea4871e6e01dcba6f642f213c16ae4f0a0084d5eee697ddc161837
sha512 f66e9d765edf611969d092a9b95e9d8c14f638f1312a899c3a14544ebd0f6949905e40a4a5f68c9a1b1de7aa042a48ff38dc63cde4f130b6beb6396cb73f0933
ripemd-160 f16eb40f85f547989813791f083040b48611a7a5

20138781 as geometric shapes

Circle

Radius = n
Diameter 40277562
Circumference 126535692.88371
Area 1.2741373038341E+15

Sphere

Radius = n
Volume 3.4212762834461E+22
Surface area 5.0965492153365E+15
Circumference 126535692.88371

Square

Length = n
Perimeter 80555124
Area 405570500165961
Diagonal 28480537.219862

Cube

Length = n
Surface area 2433423000995766
Volume 8.1676954829028E+21
Space diagonal 34881391.894503

Equilateral Triangle

Length = n
Perimeter 60416343
Area 1.7561717808464E+14
Altitude 17440695.947251

Triangular Pyramid

Length = n
Surface area 1.7561717808464E+14
Volume 9.6257214377121E+20
Height 9493512.4066205