Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

19987981 (number)

19987981 is an odd 8-digits composite number following 19987980 and preceding 19987982. In scientific notation, it is written as 1.9987981 × 10^7. The sum of its digits is 52. It has a total of 2 prime factors and 4 positive divisors. There are 17479152 positive integers (up to 19987981) that are relatively prime to 19987981.

Interesting facts

19987981 has 4 divisors, whose sum is 20069152
The reverse of 19987981 is 18978991
Previous prime number is 247

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 52
Digital Root 7

Name

Name	nineteen million nine hundred eighty-seven thousand nine hundred eighty-one

Notation

Scientific notation	1.9987981 × 10^7
Engineering notation	1.9987981 × 10^6

Prime Factorization of 19987981

Prime Factorization 247 × 80923

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	19987981	Product of the distinct prime numbers

The prime factorization of 19987981 is 247 × 80923. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 9, 23, 40, 712, 661, 3578, 590, 19637, 77457, 575518, 507976, 293381, 1418545, 142865, 22959815, 945611574, 424706881, 3474463757, 9487120272

Basic calculations (n = 19987981)

Multiplication

n×y

n×2	39975962
n×3	59963943
n×4	79951924
n×5	99939905

Division

n÷y

n÷2	9993990.5
n÷3	6662660.3333333
n÷3	4996995.25
n÷5	3997596.2

Exponentiation

n^y

n²	399519384456361
n³	7.9855858656454E+21
n⁴	1.5961573855639E+29
n⁵	3.1903963495661E+36

Nth Root

^y√n

²√n	4470.7919880039
³√n	271.38737645488
⁴√n	66.86398124554
⁵√n	28.850529322181

Divisors of 19987981

1, 247, 80923, 19987981

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-19987980	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 19987981 can be divided by 4 positive divisors. The sum of these divisors (counting 19987981) is 1, the average is 0.25.

Base conversion 19987981

Base	System	Value
2	Binary	1001100001111111000001101
3	Ternary	1101121111100121
4	Quaternary	1030033320031
5	Quinary	20104103411
6	Senary	1552224541
8	Octal	114177015
10	Decimal	19987981
12	Duodecimal	683b151
16	Hexadecimal	130fe0d
20	Vigesimal	64i9j1
36	Base36	bwetp

Cryptographic Hash Functions

md5	c6db19344acb8df2f88343f0e1aea3eb
sha1	6e623f0ed4d3249cde326cc6cad1c56808860cb1
sha256	05e7d6780d20fbd108ff71b7c4846e61360b431383b7e4d32a7639af46bad9f4
sha512	a1e77a70323eac20a026087bf3d9b72ee684c1a9bab42e06c5b5df8fedbee73180686b0f022f37698d66824d6e034c213337e9db518ce8d0031d7d90c7c51e7c
ripemd-160	1b2168e3d0c48a0775a71b96641d2746630201e9

19987981 as geometric shapes

Circle

Radius = n

Diameter	39975962
Circumference	125588188.53938
Area	1.2551271631748E+15

Sphere

Radius = n

Volume	3.3449943853496E+22
Surface area	5.0205086526993E+15
Circumference	125588188.53938

Square

Length = n

Perimeter	79951924
Area	399519384456361
Diagonal	28267273.814656

Cube

Length = n

Surface area	2397116306738166
Volume	7.9855858656454E+21
Space diagonal	34620198.632721

Equilateral Triangle

Length = n

Perimeter	59963943
Area	1.7299696812177E+14
Altitude	17310099.316361

Triangular Pyramid

Length = n

Surface area	1.7299696812177E+14
Volume	9.4111031955756E+20
Height	9422424.6048852