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

19987681 (number)

19987681 is an odd 8-digits composite number following 19987680 and preceding 19987682. In scientific notation, it is written as 1.9987681 × 10^7. The sum of its digits is 49. It has a total of 2 prime factors and 4 positive divisors. There are 17132292 positive integers (up to 19987681) that are relatively prime to 19987681.

Interesting facts

19987681 has 4 divisors, whose sum is 22843072
The reverse of 19987681 is 18678991
Previous prime number is 7

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 49
Digital Root 4

Name

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

Notation

Scientific notation	1.9987681 × 10^7
Engineering notation	1.9987681 × 10^6

Prime Factorization of 19987681

Prime Factorization 7 × 2855383

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	19987681	Product of the distinct prime numbers

The prime factorization of 19987681 is 7 × 2855383. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 9, 40, 54, 736, 142, 2291, 5613, 45535, 79489, 574228, 425492, 5477224, 9308315, 3408349, 75828288, 931485916, 487392543, 5506270882, 489227907

Basic calculations (n = 19987681)

Multiplication

n×y

n×2	39975362
n×3	59963043
n×4	79950724
n×5	99938405

Division

n÷y

n÷2	9993840.5
n÷3	6662560.3333333
n÷3	4996920.25
n÷5	3997536.2

Exponentiation

n^y

n²	399507391757761
n³	7.9852263035962E+21
n⁴	1.5960615606909E+29
n⁵	3.1901569331452E+36

Nth Root

^y√n

²√n	4470.7584367756
³√n	271.38601869527
⁴√n	66.863730353425
⁵√n	28.850442718029

Divisors of 19987681

1, 7, 2855383, 19987681

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	-19987680	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 19987681 can be divided by 4 positive divisors. The sum of these divisors (counting 19987681) is 1, the average is 0.25.

Base conversion 19987681

Base	System	Value
2	Binary	1001100001111110011100001
3	Ternary	1101121110221111
4	Quaternary	1030033303201
5	Quinary	20104101211
6	Senary	1552223321
8	Octal	114176341
10	Decimal	19987681
12	Duodecimal	683ab41
16	Hexadecimal	130fce1
20	Vigesimal	64i941
36	Base36	bweld

Cryptographic Hash Functions

md5	645dabf18a6837007ae8a84e45ae9dca
sha1	876fcb23011d4dbd9b3da81208628dc35ad66815
sha256	5d0e3a59ae81c69f7f98bc45a133809568033feea46c84438b8ead74824ac74c
sha512	07d731a9a88b1c8a51d9af3407634ff99c9e7aa1b6be2cbf779a5ffaa285f6b24edce363028760fe0d6c7712e028e7abfe3fd0fbda6a04bec538db9d18a0fae6
ripemd-160	b941871d7368436c4173827438f879251d29570d

19987681 as geometric shapes

Circle

Radius = n

Diameter	39975362
Circumference	125586303.58379
Area	1.255089487001E+15

Sphere

Radius = n

Volume	3.3448437723506E+22
Surface area	5.020357948004E+15
Circumference	125586303.58379

Square

Length = n

Perimeter	79950724
Area	399507391757761
Diagonal	28266849.550587

Cube

Length = n

Surface area	2397044350546566
Volume	7.9852263035962E+21
Space diagonal	34619679.017479

Equilateral Triangle

Length = n

Perimeter	59963043
Area	1.7299177513094E+14
Altitude	17309839.50874

Triangular Pyramid

Length = n

Surface area	1.7299177513094E+14
Volume	9.4106794476367E+20
Height	9422283.183529