20181990 (number)

20181990 is an even 8-digits composite number following 20181989 and preceding 20181991. In scientific notation, it is written as 2.0181990 × 10^7. The sum of its digits is 30. It has a total of 4 prime factors and 16 positive divisors. There are 5098464 positive integers (up to 20181990) that are relatively prime to 20181990.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.0181990 × 10^7
Engineering notation 2.0181990 × 10^6

Prime Factorization of 20181990

Prime Factorization 2 × 15 × 19 × 35407

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20181990
Product of the distinct prime numbers

The prime factorization of 20181990 is 2 × 15 × 19 × 35407. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 9, 48, 11, 211, 739, 3454, 7467, 40379, 57687, 192776, 591580, 5299201, 9694602, 73094628, 30917707, 50114208, 514628633, 8506517290, 7166996008

Basic calculations (n = 20181990)

Multiplication

n×y
n×2 40363980
n×3 60545970
n×4 80727960
n×5 100909950

Division

n÷y
n÷2 10090995
n÷3 6727330
n÷3 5045497.5
n÷5 4036398

Exponentiation

ny
n2 407312720360100
n3 8.2203812491803E+21
n4 1.6590365216715E+29
n5 3.3482658490008E+36

Nth Root

y√n
2√n 4492.4369778551
3√n 272.26260501996
4√n 67.025644180829
5√n 28.906319415274

Divisors of 20181990

1, 2, 15, 19, 30, 38, 285, 570, 35407, 70814, 531105, 672733, 1062210, 1345466, 10090995, 20181990

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20181989
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20181990 can be divided by 16 positive divisors. The sum of these divisors (counting 20181990) is 1, the average is 0.0625.

Base conversion 20181990

Base System Value
2 Binary 1001100111111001111100110
3 Ternary 1101222100111010
4 Quaternary 1030333033212
5 Quinary 20131310430
6 Senary 2000323050
8 Octal 114771746
10 Decimal 20181990
12 Duodecimal 6913486
16 Hexadecimal 133f3e6
20 Vigesimal 662eja
36 Base36 c0kiu

Cryptographic Hash Functions

md5 2290ed43689864973e0cb94f3e5af9d7
sha1 ffcf2a59d1278e5c8d21224830498dfab588401c
sha256 c86967e335fc56602677639680dac2a52d3c1aae87ce79f544f7a6b4da38561e
sha512 b9aea5e270cc5d1388b301d512d7b2ae42e987d72fcb3ac0f3acf8d4e7ca520a3f471e0e745004dfc0cf26674bdbb32427e79e3026856834c23e166ab6ecb0fb
ripemd-160 72dec9049868665080a1969187dfc2069061b155

20181990 as geometric shapes

Circle

Radius = n
Diameter 40363980
Circumference 126807183.03765
Area 1.279610649997E+15

Sphere

Radius = n
Volume 3.4433452456176E+22
Surface area 5.1184425999879E+15
Circumference 126807183.03765

Square

Length = n
Perimeter 80727960
Area 407312720360100
Diagonal 28541643.973678

Cube

Length = n
Surface area 2443876322160600
Volume 8.2203812491803E+21
Space diagonal 34956232.077847

Equilateral Triangle

Length = n
Perimeter 60545970
Area 1.763715815582E+14
Altitude 17478116.038924

Triangular Pyramid

Length = n
Surface area 1.763715815582E+14
Volume 9.6878122087236E+20
Height 9513881.3245594