18887981 (number)

18887981 is an odd 8-digits composite number following 18887980 and preceding 18887982. In scientific notation, it is written as 1.8887981 × 10^7. The sum of its digits is 50. It has a total of 4 prime factors and 16 positive divisors. There are 15868944 positive integers (up to 18887981) that are relatively prime to 18887981.

Interesting facts

Basic properties

Name

Name eighteen million eight hundred eighty-seven thousand nine hundred eighty-one

Notation

Scientific notation 1.8887981 × 10^7
Engineering notation 1.8887981 × 10^6

Prime Factorization of 18887981

Prime Factorization 7 × 49 × 53 × 1039

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 18887981
Product of the distinct prime numbers

The prime factorization of 18887981 is 7 × 49 × 53 × 1039. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 4, 36, 24, 259, 587, 5937, 913, 70077, 41802, 646420, 955877, 6725379, 6573782, 90539704, 44846322, 386291322, 811379158, 7911560356, 7247575423

Basic calculations (n = 18887981)

Multiplication

n×y
n×2 37775962
n×3 56663943
n×4 75551924
n×5 94439905

Division

n÷y
n÷2 9443990.5
n÷3 6295993.6666667
n÷3 4721995.25
n÷5 3777596.2

Exponentiation

ny
n2 356755826256361
n3 6.7383972679694E+21
n4 1.2727471956786E+29
n5 2.403962484978E+36

Nth Root

y√n
2√n 4346.0304876979
3√n 266.31472443211
4√n 65.924430127973
5√n 28.525752345823

Divisors of 18887981

1, 7, 49, 53, 343, 371, 1039, 2597, 7273, 18179, 50911, 55067, 356377, 385469, 2698283, 18887981

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 -18887980
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 18887981 can be divided by 16 positive divisors. The sum of these divisors (counting 18887981) is 1, the average is 0.0625.

Base conversion 18887981

Base System Value
2 Binary 1001000000011010100101101
3 Ternary 1022112121102212
4 Quaternary 1020003110231
5 Quinary 14313403411
6 Senary 1512500205
8 Octal 110032455
10 Decimal 18887981
12 Duodecimal 63aa665
16 Hexadecimal 120352d
20 Vigesimal 5i0jj1
36 Base36 b8u25

Cryptographic Hash Functions

md5 64f9878cf058660e2c0ae2b7e777dc5f
sha1 26b5fe1175995968652c7096882ba34a00799145
sha256 21da4642e045260fc23ff18f0c3979d23210e139e2fb8ccbba5091db4f7a593e
sha512 83e1b4c9d6d52923c14a0cc6ec1f22ce1f354997cf7d2246918fecaccad34aced42273aedf5b8b63da6a606d81f6beb85977cf9575f855e0d61ae324f3454796
ripemd-160 2dbf310237a9fe8930b993131751b25225a6d82b

18887981 as geometric shapes

Circle

Radius = n
Diameter 37775962
Circumference 118676684.70149
Area 1.1207814828923E+15

Sphere

Radius = n
Volume 2.822573247203E+22
Surface area 4.4831259315694E+15
Circumference 118676684.70149

Square

Length = n
Perimeter 75551924
Area 356755826256361
Diagonal 26711638.896045

Cube

Length = n
Surface area 2140534957538166
Volume 6.7383972679694E+21
Space diagonal 32714942.744396

Equilateral Triangle

Length = n
Perimeter 56663943
Area 1.5447980424306E+14
Altitude 16357471.372198

Triangular Pyramid

Length = n
Surface area 1.5447980424306E+14
Volume 7.9412773375168E+20
Height 8903879.6320151