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

18981381 (number)

18981381 is an odd 8-digits composite number following 18981380 and preceding 18981382. In scientific notation, it is written as 1.8981381 × 10^7. The sum of its digits is 39. It has a total of 2 prime factors and 4 positive divisors. There are 12654252 positive integers (up to 18981381) that are relatively prime to 18981381.

Interesting facts

18981381 has 4 divisors, whose sum is 25308512
The reverse of 18981381 is 18318981
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 39
Digital Root 3

Name

Name	eighteen million nine hundred eighty-one thousand three hundred eighty-one

Notation

Scientific notation	1.8981381 × 10^7
Engineering notation	1.8981381 × 10^6

Prime Factorization of 18981381

Prime Factorization 3 × 6327127

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	18981381	Product of the distinct prime numbers

The prime factorization of 18981381 is 3 × 6327127. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 10, 49, 81, 545, 117, 5880, 7988, 32011, 96863, 406073, 416263, 3002027, 2714600, 2247762, 62626851, 887484361, 567622970, 1820030100, 165585107

Basic calculations (n = 18981381)

Multiplication

n×y

n×2	37962762
n×3	56944143
n×4	75925524
n×5	94906905

Division

n÷y

n÷2	9490690.5
n÷3	6327127
n÷3	4745345.25
n÷5	3796276.2

Exponentiation

n^y

n²	360292824667161
n³	6.8388553765736E+21
n⁴	1.2981091950664E+29
n⁵	2.4639905211159E+36

Nth Root

^y√n

²√n	4356.7626742801
³√n	266.75297327915
⁴√n	66.005777582573
⁵√n	28.553908355883

Divisors of 18981381

1, 3, 6327127, 18981381

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	-18981380	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 18981381 can be divided by 4 positive divisors. The sum of these divisors (counting 18981381) is 1, the average is 0.25.

Base conversion 18981381

Base	System	Value
2	Binary	1001000011010001000000101
3	Ternary	1022201100120010
4	Quaternary	1020122020011
5	Quinary	14324401011
6	Senary	1514500433
8	Octal	110321005
10	Decimal	18981381
12	Duodecimal	6434719
16	Hexadecimal	121a205
20	Vigesimal	5icd91
36	Base36	bau4l

Cryptographic Hash Functions

md5	63bf1b465f2aee624362d0393758bca7
sha1	4d75fd5072157f27bdb704d87362cc0cb660e95d
sha256	7076570129d70f60b6016aa2ead446f312509109d4cf01113c3de6bea592fbf0
sha512	261b2c3845eb577e4247e952484fd94feeb344ab89f9608a49bb7f7d4fea9cacda53b063922bad42506451dc95d46b6005976cb77597f6b7958d354d98629957
ripemd-160	e5d75dd033035daa376ad7e1663056c83621b30e

18981381 as geometric shapes

Circle

Radius = n

Diameter	37962762
Circumference	119263534.20918
Area	1.1318932911155E+15

Sphere

Radius = n

Volume	2.8646530413342E+22
Surface area	4.5275731644619E+15
Circumference	119263534.20918

Square

Length = n

Perimeter	75925524
Area	360292824667161
Diagonal	26843726.442771

Cube

Length = n

Surface area	2161756948002966
Volume	6.8388553765736E+21
Space diagonal	32876716.289823

Equilateral Triangle

Length = n

Perimeter	56944143
Area	1.5601136948151E+14
Altitude	16438358.144911

Triangular Pyramid

Length = n

Surface area	1.5601136948151E+14
Volume	8.0596683538821E+20
Height	8947908.814257