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

20687981 (number)

20687981 is an odd 8-digits composite number following 20687980 and preceding 20687982. In scientific notation, it is written as 2.0687981 × 10^7. The sum of its digits is 41. It has a total of 2 prime factors and 4 positive divisors. There are 20404512 positive integers (up to 20687981) that are relatively prime to 20687981.

Interesting facts

20687981 has 4 divisors, whose sum is 20971452
The reverse of 20687981 is 18978602
Previous prime number is 73

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 41
Digital Root 5

Name

Name	twenty million six hundred eighty-seven thousand nine hundred eighty-one

Notation

Scientific notation	2.0687981 × 10^7
Engineering notation	2.0687981 × 10^6

Prime Factorization of 20687981

Prime Factorization 73 × 283397

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	20687981	Product of the distinct prime numbers

The prime factorization of 20687981 is 73 × 283397. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 10, 17, 91, 79, 967, 9071, 16, 73874, 23293, 560245, 580008, 8217405, 7757499, 67083486, 12187473, 5241311, 872468246, 1894719826, 6955030323

Basic calculations (n = 20687981)

Multiplication

n×y

n×2	41375962
n×3	62063943
n×4	82751924
n×5	103439905

Division

n÷y

n÷2	10343990.5
n÷3	6895993.6666667
n÷3	5171995.25
n÷5	4137596.2

Exponentiation

n^y

n²	427992557856361
n³	8.8543019050738E+21
n⁴	1.8317762958043E+29
n⁵	3.789575320385E+36

Nth Root

^y√n

²√n	4548.4042256598
³√n	274.51918627499
⁴√n	67.44185811245
⁵√n	29.0498317725

Divisors of 20687981

1, 73, 283397, 20687981

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	-20687980	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 20687981 can be divided by 4 positive divisors. The sum of these divisors (counting 20687981) is 1, the average is 0.25.

Base conversion 20687981

Base	System	Value
2	Binary	1001110111010110001101101
3	Ternary	1102221001120112
4	Quaternary	1032322301231
5	Quinary	20244003411
6	Senary	2015225405
8	Octal	116726155
10	Decimal	20687981
12	Duodecimal	6b18265
16	Hexadecimal	13bac6d
20	Vigesimal	695jj1
36	Base36	cbey5

Cryptographic Hash Functions

md5	b805697ec9bd08d88b98d56d05cbbd74
sha1	ffa69f949f4b0097f22dad1cab40d4bc6ffff15c
sha256	265d06eb870387aea6f4728442862e20470d242ed6d8e5526699a515e9d7f3ff
sha512	99b5c415fc4bfff84862cda6033ff07d15891af53f59880a0ab36ca5dcba54a6c5cd4c4bf0ab2cf881d088fe718aeddcce3ec129eedb5bef5ae0632a61d39427
ripemd-160	7ddf694db2c9cb4c74ff19f2c6e397dc6e9882c7

20687981 as geometric shapes

Circle

Radius = n

Diameter	41375962
Circumference	129986418.25441
Area	1.3445782755526E+15

Sphere

Radius = n

Volume	3.7088813090195E+22
Surface area	5.3783131022106E+15
Circumference	129986418.25441

Square

Length = n

Perimeter	82751924
Area	427992557856361
Diagonal	29257223.308317

Cube

Length = n

Surface area	2567955347138166
Volume	8.8543019050738E+21
Space diagonal	35832634.19802

Equilateral Triangle

Length = n

Perimeter	62063943
Area	1.8532621386714E+14
Altitude	17916317.09901

Triangular Pyramid

Length = n

Surface area	1.8532621386714E+14
Volume	1.0434894866251E+21
Height	9752407.769439