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

20921987 (number)

20921987 is an odd 8-digits prime number following 20921986 and preceding 20921988. In scientific notation, it is written as 2.0921987 × 10^7. The sum of its digits is 38. It has a total of 1 prime factors and 2 positive divisors. There are 20921986 positive integers (up to 20921987) that are relatively prime to 20921987.

Interesting facts

20921987 has 2 divisors, whose sum is 20921988
The reverse of 20921987 is 78912902
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 38
Digital Root 2

Name

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

Notation

Scientific notation	2.0921987 × 10^7
Engineering notation	2.0921987 × 10^6

Prime Factorization of 20921987

Prime Factorization 20921987

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	20921987	Product of the distinct prime numbers

The prime factorization of 20921987 is 20921987. Since it has a total of 1 prime factors.

Most popular turbo-numbers

8, 8, 33, 3, 162, 165, 1976, 8660, 32363, 96267, 292012, 670346, 2908154, 1922878, 68796319, 80397947, 21266403, 439231796, 8588053866, 8883872645

Basic calculations (n = 20921987)

Multiplication

n×y

n×2	41843974
n×3	62765961
n×4	83687948
n×5	104609935

Division

n÷y

n÷2	10460993.5
n÷3	6973995.6666667
n÷3	5230496.75
n÷5	4184397.4

Exponentiation

n^y

n²	437729540028169
n³	9.1581717459853E+21
n⁴	1.9160715021327E+29
n⁵	4.0088023058691E+36

Nth Root

^y√n

²√n	4574.0558588631
³√n	275.55035569325
⁴√n	67.631766640116
⁵√n	29.115254158084

Divisors of 20921987

1, 20921987

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	20921988	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	10460994	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	4574.0559681753	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999044068	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20921987 can be divided by 2 positive divisors. The sum of these divisors (counting 20921987) is 20921988, the average is 10460994.

Base conversion 20921987

Base	System	Value
2	Binary	1001111110011111010000011
3	Ternary	1110100221120102
4	Quaternary	1033303322003
5	Quinary	20324000422
6	Senary	2024233015
8	Octal	117637203
10	Decimal	20921987
12	Duodecimal	700b76b
16	Hexadecimal	13f3e83
20	Vigesimal	6af4j7
36	Base36	cgfib

Cryptographic Hash Functions

md5	3a817000eaded8c7a6aaa7108e49d7d8
sha1	c7e32585f0bbfb550dde082f4bfa4c3663141f27
sha256	a3a0934452e958c9ccd3f6099c71499e7baacc3c1825aa56fdbf288eedf59d9e
sha512	fd40ec2c10ec442d84b3e4c0e6b970d47d5c84af46b8d076f3e386d28c538a036ec34fefe5ec291a58234106b883a6ec3ee11257bc74f8601323d96feacccce3
ripemd-160	af4cbd1882dd38e44f23a1f7b075fcf1c27d60c5

20921987 as geometric shapes

Circle

Radius = n

Diameter	41843974
Circumference	131456721.3154
Area	1.3751679072117E+15

Sphere

Radius = n

Volume	3.8361660103335E+22
Surface area	5.5006716288469E+15
Circumference	131456721.3154

Square

Length = n

Perimeter	83687948
Area	437729540028169
Diagonal	29588157.767194

Cube

Length = n

Surface area	2626377240169014
Volume	9.1581717459853E+21
Space diagonal	36237944.479296

Equilateral Triangle

Length = n

Perimeter	62765961
Area	1.8954245082564E+14
Altitude	18118972.239648

Triangular Pyramid

Length = n

Surface area	1.8954245082564E+14
Volume	1.0793008908095E+21
Height	9862719.2557312