20181021 (number)

20181021 is an odd 8-digits composite number following 20181020 and preceding 20181022. In scientific notation, it is written as 2.0181021 × 10^7. The sum of its digits is 15. It has a total of 5 prime factors and 32 positive divisors. There are 10622016 positive integers (up to 20181021) that are relatively prime to 20181021.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.0181021 × 10^7
Engineering notation 2.0181021 × 10^6

Prime Factorization of 20181021

Prime Factorization 3 × 7 × 37 × 19 × 1367

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 20181021
Product of the distinct prime numbers

The prime factorization of 20181021 is 3 × 7 × 37 × 19 × 1367. Since it has a total of 5 prime factors.

Most popular turbo-numbers

10, 8, 41, 52, 74, 558, 4062, 1053, 16113, 71633, 25812, 550520, 6436088, 8323602, 56206039, 5958540, 460745731, 399729838, 6255082787, 3830337929

Basic calculations (n = 20181021)

Multiplication

n×y
n×2 40362042
n×3 60543063
n×4 80724084
n×5 100905105

Division

n÷y
n÷2 10090510.5
n÷3 6727007
n÷3 5045255.25
n÷5 4036204.2

Exponentiation

ny
n2 407273608602441
n3 8.2191972479516E+21
n4 1.6587179226405E+29
n5 3.3474621229885E+36

Nth Root

y√n
2√n 4492.3291286369
3√n 272.25824755923
4√n 67.024839639024
5√n 28.906041833515

Divisors of 20181021

1, 3, 7, 19, 21, 37, 57, 111, 133, 259, 399, 703, 777, 1367, 2109, 4101, 4921, 9569, 14763, 25973, 28707, 50579, 77919, 151737, 181811, 354053, 545433, 961001, 1062159, 2883003, 6727007, 20181021

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 -20181020
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 20181021 can be divided by 32 positive divisors. The sum of these divisors (counting 20181021) is 1, the average is 0.03125.

Base conversion 20181021

Base System Value
2 Binary 1001100111111000000011101
3 Ternary 1101222022011020
4 Quaternary 1030333000131
5 Quinary 20131243041
6 Senary 2000314353
8 Octal 114770035
10 Decimal 20181021
12 Duodecimal 69129b9
16 Hexadecimal 133f01d
20 Vigesimal 662cb1
36 Base36 c0jrx

Cryptographic Hash Functions

md5 3810434618a15ed2a40be0c1d49071df
sha1 bab46492929310cc33aab1dfdb1ab80c825f3bae
sha256 84549831b039fa945eeb2f6e0e91998c246bf6748ec2302912b097f50afa8a4b
sha512 983523ba478e31bae1bc385233c721053f7f0615acf07b27015c024e3938c028d5ec82e41354b83e52a37217a0666b9b258a1bb5ced179c1959e55700e949c8f
ripemd-160 47c1e30505869d41f283a5369e3d9a425ab25041

20181021 as geometric shapes

Circle

Radius = n
Diameter 40362042
Circumference 126801094.63108
Area 1.2794877767864E+15

Sphere

Radius = n
Volume 3.4428492923427E+22
Surface area 5.1179511071457E+15
Circumference 126801094.63108

Square

Length = n
Perimeter 80724084
Area 407273608602441
Diagonal 28540273.600736

Cube

Length = n
Surface area 2443641651614646
Volume 8.2191972479516E+21
Space diagonal 34954553.720614

Equilateral Triangle

Length = n
Perimeter 60543063
Area 1.7635464567034E+14
Altitude 17477276.860307

Triangular Pyramid

Length = n
Surface area 1.7635464567034E+14
Volume 9.686416849894E+20
Height 9513424.5335787