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

20181987 (number)

20181987 is an odd 8-digits composite number following 20181986 and preceding 20181988. In scientific notation, it is written as 2.0181987 × 10^7. The sum of its digits is 36. It has a total of 3 prime factors and 8 positive divisors. There are 11532456 positive integers (up to 20181987) that are relatively prime to 20181987.

Interesting facts

20181987 has 8 divisors, whose sum is 27336704
The reverse of 20181987 is 78918102
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 36
Digital Root 9

Name

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

Notation

Scientific notation	2.0181987 × 10^7
Engineering notation	2.0181987 × 10^6

Prime Factorization of 20181987

Prime Factorization 63 × 3 × 106783

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	20181987	Product of the distinct prime numbers

The prime factorization of 20181987 is 63 × 3 × 106783. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 8, 15, 64, 492, 803, 6021, 3027, 97424, 54752, 244661, 112220, 5034095, 5133339, 37426490, 9617927, 607640456, 76586018, 5841364356, 5480838719

Basic calculations (n = 20181987)

Multiplication

n×y

n×2	40363974
n×3	60545961
n×4	80727948
n×5	100909935

Division

n÷y

n÷2	10090993.5
n÷3	6727329
n÷3	5045496.75
n÷5	4036397.4

Exponentiation

n^y

n²	407312599268169
n³	8.2203775833664E+21
n⁴	1.6590355352259E+29
n⁵	3.3482633604468E+36

Nth Root

^y√n

²√n	4492.4366439606
³√n	272.26259152959
⁴√n	67.025641690032
⁵√n	28.906318555905

Divisors of 20181987

1, 3, 63, 189, 106783, 320349, 6727329, 20181987

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-20181986	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20181987 can be divided by 8 positive divisors. The sum of these divisors (counting 20181987) is 1, the average is 0.125.

Base conversion 20181987

Base	System	Value
2	Binary	1001100111111001111100011
3	Ternary	1101222100111000
4	Quaternary	1030333033203
5	Quinary	20131310422
6	Senary	2000323043
8	Octal	114771743
10	Decimal	20181987
12	Duodecimal	6913483
16	Hexadecimal	133f3e3
20	Vigesimal	662ej7
36	Base36	c0kir

Cryptographic Hash Functions

md5	21ec4fca8ef4e9969d3080ae4dd22028
sha1	71c949093f2110e04b82e630b9c748b5d9a98995
sha256	0db46286bdeaee83212d3908256f2b4a6e4944c5dd080beb7e88dc353467508d
sha512	ecebe0fded8b77567efc591f8f6c458722163b70f030bea0849a149817241d5eafd811cbbfc8527ac288b431c2af75d9c33193b647cf801f9c66493373cfc7bc
ripemd-160	4289e61c51773b250cff5bb885bf75946b3b36e7

20181987 as geometric shapes

Circle

Radius = n

Diameter	40363974
Circumference	126807164.18809
Area	1.2796102695754E+15

Sphere

Radius = n

Volume	3.4433437100851E+22
Surface area	5.1184410783018E+15
Circumference	126807164.18809

Square

Length = n

Perimeter	80727948
Area	407312599268169
Diagonal	28541639.731037

Cube

Length = n

Surface area	2443875595609014
Volume	8.2203775833664E+21
Space diagonal	34956226.881695

Equilateral Triangle

Length = n

Perimeter	60545961
Area	1.7637152912385E+14
Altitude	17478113.440847

Triangular Pyramid

Length = n

Surface area	1.7637152912385E+14
Volume	9.6878078885204E+20
Height	9513879.9103458