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

20121991 (number)

20121991 is an odd 8-digits composite number following 20121990 and preceding 20121992. In scientific notation, it is written as 2.0121991 × 10^7. The sum of its digits is 25. It has a total of 2 prime factors and 4 positive divisors. There are 20112984 positive integers (up to 20121991) that are relatively prime to 20121991.

Interesting facts

20121991 has 4 divisors, whose sum is 20131000
The reverse of 20121991 is 19912102
Previous prime number is 4099

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 25
Digital Root 7

Name

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

Notation

Scientific notation	2.0121991 × 10^7
Engineering notation	2.0121991 × 10^6

Prime Factorization of 20121991

Prime Factorization 4099 × 4909

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	20121991	Product of the distinct prime numbers

The prime factorization of 20121991 is 4099 × 4909. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 4, 45, 29, 122, 220, 9730, 2152, 85751, 94721, 395602, 981130, 2543350, 8763608, 78084114, 33190594, 608230115, 403094682, 8684261187, 1456556205

Basic calculations (n = 20121991)

Multiplication

n×y

n×2	40243982
n×3	60365973
n×4	80487964
n×5	100609955

Division

n÷y

n÷2	10060995.5
n÷3	6707330.3333333
n÷3	5030497.75
n÷5	4024398.2

Exponentiation

n^y

n²	404894521804081
n³	8.147283923691E+21
n⁴	1.6393957378696E+29
n⁵	3.298790628285E+36

Nth Root

^y√n

²√n	4485.7542286666
³√n	271.99253421694
⁴√n	66.975773445826
⁵√n	28.889111832041

Divisors of 20121991

1, 4099, 4909, 20121991

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	-20121990	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 20121991 can be divided by 4 positive divisors. The sum of these divisors (counting 20121991) is 1, the average is 0.25.

Base conversion 20121991

Base	System	Value
2	Binary	1001100110000100110000111
3	Ternary	1101212022011221
4	Quaternary	1030300212013
5	Quinary	20122400431
6	Senary	1555141211
8	Octal	114604607
10	Decimal	20121991
12	Duodecimal	68a4807
16	Hexadecimal	1330987
20	Vigesimal	65f4jb
36	Base36	bza87

Cryptographic Hash Functions

md5	9969d5a1dcfa6d4395b2102d98f32258
sha1	f35a26194a7944a3467dd456e72641a68de125ed
sha256	6f438e60730da99f9329d34c56cd99ad6327c644516218fbbf71ca4d8ba04bbb
sha512	d7a4a5fd4e207da692f40471dbc5b904e6aa253554128cb7a271797f95cdfa2f4d3c7b666e3ef3bb293cc956a59d5a826d3e9d9cdfdf9ed0cee615c49cec30cf
ripemd-160	6f17d725bf7b039c9e98d55636c68516e4f9b0a9

20121991 as geometric shapes

Circle

Radius = n

Diameter	40243982
Circumference	126430198.2024
Area	1.2720136551785E+15

Sphere

Radius = n

Volume	3.4127263095171E+22
Surface area	5.0880546207138E+15
Circumference	126430198.2024

Square

Length = n

Perimeter	80487964
Area	404894521804081
Diagonal	28456792.574149

Cube

Length = n

Surface area	2429367130824486
Volume	8.147283923691E+21
Space diagonal	34852310.761444

Equilateral Triangle

Length = n

Perimeter	60365973
Area	1.7532447086774E+14
Altitude	17426155.380722

Triangular Pyramid

Length = n

Surface area	1.7532447086774E+14
Volume	9.6016661844901E+20
Height	9485597.5247165