20781390 (number)

20781390 is an even 8-digits composite number following 20781389 and preceding 20781391. In scientific notation, it is written as 2.0781390 × 10^7. The sum of its digits is 30. It has a total of 5 prime factors and 32 positive divisors. There are 4656960 positive integers (up to 20781390) that are relatively prime to 20781390.

Interesting facts

Basic properties

Name

Name twenty million seven hundred eighty-one thousand three hundred ninety

Notation

Scientific notation 2.0781390 × 10^7
Engineering notation 2.0781390 × 10^6

Prime Factorization of 20781390

Prime Factorization 2 × 105 × 7 × 67 × 211

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 20781390
Product of the distinct prime numbers

The prime factorization of 20781390 is 2 × 105 × 7 × 67 × 211. Since it has a total of 5 prime factors.

Most popular turbo-numbers

1, 4, 2, 42, 681, 126, 2648, 7337, 2126, 34601, 886125, 427207, 7293019, 779955, 98482039, 70761976, 326969349, 312086346, 5543822622, 1946421115

Basic calculations (n = 20781390)

Multiplication

n×y
n×2 41562780
n×3 62344170
n×4 83125560
n×5 103906950

Division

n÷y
n÷2 10390695
n÷3 6927130
n÷3 5195347.5
n÷5 4156278

Exponentiation

ny
n2 431866170332100
n3 8.9747793134778E+21
n4 1.8650838907731E+29
n5 3.8759035716874E+36

Nth Root

y√n
2√n 4558.6609876147
3√n 274.93172960934
4√n 67.517856805549
5√n 29.07601729748

Divisors of 20781390

1, 2, 7, 14, 67, 105, 134, 210, 211, 422, 469, 735, 938, 1470, 1477, 2954, 7035, 14070, 14137, 22155, 28274, 44310, 49245, 98490, 98959, 155085, 197918, 310170, 1484385, 2968770, 10390695, 20781390

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20781389
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20781390 can be divided by 32 positive divisors. The sum of these divisors (counting 20781390) is 1, the average is 0.03125.

Base conversion 20781390

Base System Value
2 Binary 1001111010001100101001110
3 Ternary 1110002210201010
4 Quaternary 1033101211032
5 Quinary 20310001030
6 Senary 2021230050
8 Octal 117214516
10 Decimal 20781390
12 Duodecimal 6b62326
16 Hexadecimal 13d194e
20 Vigesimal 69hd9a
36 Base36 cdf0u

Cryptographic Hash Functions

md5 c16f21612e3811391cef0c0002422fea
sha1 24c502d0c0e82f127486cc2e314bf16676f96f3e
sha256 5383db442a5995ed3594257116ab222aa3db504707dc0d88291a5659d120c8d0
sha512 2fd734b7b5f534dae6fe3d8d481def5257bd3967defb24d8edb9cf86b3cffadd6a0d73fd7a5c01fe0f2bb5089afecfe85e292d2bc337506cf4322a4495f1412d
ripemd-160 58ff8dbb16fc2cc1bdde33be938ca14974f22513

20781390 as geometric shapes

Circle

Radius = n
Diameter 41562780
Circumference 130573324.31077
Area 1.3567475880493E+15

Sphere

Radius = n
Volume 3.7593467678415E+22
Surface area 5.4269903521971E+15
Circumference 130573324.31077

Square

Length = n
Perimeter 83125560
Area 431866170332100
Diagonal 29389323.582965

Cube

Length = n
Surface area 2591197021992600
Volume 8.9747793134778E+21
Space diagonal 35994423.331904

Equilateral Triangle

Length = n
Perimeter 62344170
Area 1.8700353727135E+14
Altitude 17997211.665952

Triangular Pyramid

Length = n
Surface area 1.8700353727135E+14
Volume 1.0576878853688E+21
Height 9796441.1943215