20181 (number)

20181 is an odd 5-digits composite number following 20180 and preceding 20182. In scientific notation, it is written as 2.0181 × 10^4. The sum of its digits is 12. It has a total of 4 prime factors and 12 positive divisors. There are 11160 positive integers (up to 20181) that are relatively prime to 20181.

Interesting facts

Basic properties

Name

Name twenty thousand one hundred eighty-one

Notation

Scientific notation 2.0181 × 10^4
Engineering notation 2.0181 × 10^3

Prime Factorization of 20181

Prime Factorization 7 × 3 × 31 × 31

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 651
Product of the distinct prime numbers

The prime factorization of 20181 is 7 × 3 × 31 × 31. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 5, 77, 69, 152, 717, 1920, 3957, 90439, 63411, 460768, 981059, 5783881, 4124356, 37173855, 90110668, 443488138, 972405749, 2705403651, 4338590158

Basic calculations (n = 20181)

Multiplication

n×y
n×2 40362
n×3 60543
n×4 80724
n×5 100905

Division

n÷y
n÷2 10090.5
n÷3 6727
n÷3 5045.25
n÷5 4036.2

Exponentiation

ny
n2 407272761
n3 8219171589741
n4 165871101852563121
n5 3.3474447064866E+21

Nth Root

y√n
2√n 142.05984654363
3√n 27.225815312355
4√n 11.918886128478
5√n 7.2608679159193

Divisors of 20181

1, 3, 7, 21, 31, 93, 217, 651, 961, 2883, 6727, 20181

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20180
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20181 can be divided by 12 positive divisors. The sum of these divisors (counting 20181) is 1, the average is 0.083333333333333.

Base conversion 20181

Base System Value
2 Binary 100111011010101
3 Ternary 1000200110
4 Quaternary 10323111
5 Quinary 1121211
6 Senary 233233
8 Octal 47325
10 Decimal 20181
12 Duodecimal b819
16 Hexadecimal 4ed5
20 Vigesimal 2a91
36 Base36 fkl

Cryptographic Hash Functions

md5 6974909f63282da92162267b49df3b34
sha1 33e649a8a0d54d0a02419abafb35f67eeee1fff4
sha256 8295bff373057234531627dbad9d33550c13492997845ee26ba1a6de9ff3fcde
sha512 96a73492a0edd57cadccffae3518e1f7cef6b791b4a58b935e348fcb4938296f142e6b8a2e98aa632d74ed924295da9a1e89b4e4a3948dec3df3b0686d156671
ripemd-160 7045973570e5f76766d171a6e04f0b5e092317af

20181 as geometric shapes

Circle

Radius = n
Diameter 40362
Circumference 126800.96268419
Area 1279485113.9648

Sphere

Radius = n
Volume 34428385446566
Surface area 5117940455.8593
Circumference 126800.96268419

Square

Length = n
Perimeter 80724
Area 407272761
Diagonal 28540.243902251

Cube

Length = n
Surface area 2443636566
Volume 8219171589741
Space diagonal 34954.517347548

Equilateral Triangle

Length = n
Perimeter 60543
Area 176354278.64771
Altitude 17477.258673774

Triangular Pyramid

Length = n
Surface area 176354278.64771
Volume 968638661140.28
Height 9513.4146340838