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

20161981 (number)

20161981 is an odd 8-digits composite number following 20161980 and preceding 20161982. In scientific notation, it is written as 2.0161981 × 10^7. The sum of its digits is 28. It has a total of 2 prime factors and 4 positive divisors. There are 17281656 positive integers (up to 20161981) that are relatively prime to 20161981.

Interesting facts

20161981 has 4 divisors, whose sum is 20573500
The reverse of 20161981 is 18916102
Previous prime number is 49

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 28
Digital Root 1

Name

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

Notation

Scientific notation	2.0161981 × 10^7
Engineering notation	2.0161981 × 10^6

Prime Factorization of 20161981

Prime Factorization 49 × 411469

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	20161981	Product of the distinct prime numbers

The prime factorization of 20161981 is 49 × 411469. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 6, 1, 50, 733, 12, 4076, 917, 46891, 47138, 678850, 239030, 9104137, 2905613, 17402329, 85781746, 166084755, 565415895, 5094746674, 3463514247

Basic calculations (n = 20161981)

Multiplication

n×y

n×2	40323962
n×3	60485943
n×4	80647924
n×5	100809905

Division

n÷y

n÷2	10080990.5
n÷3	6720660.3333333
n÷3	5040495.25
n÷5	4032396.2

Exponentiation

n^y

n²	406505477844361
n³	8.1959557206939E+21
n⁴	1.6524670351747E+29
n⁵	3.3317008966319E+36

Nth Root

^y√n

²√n	4490.2094605931
³√n	272.17259896684
⁴√n	67.009025217452
⁵√n	28.90058543113

Divisors of 20161981

1, 49, 411469, 20161981

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	-20161980	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 20161981 can be divided by 4 positive divisors. The sum of these divisors (counting 20161981) is 1, the average is 0.25.

Base conversion 20161981

Base	System	Value
2	Binary	1001100111010010110111101
3	Ternary	1101221100001001
4	Quaternary	1030322112331
5	Quinary	20130140411
6	Senary	2000050301
8	Octal	114722675
10	Decimal	20161981
12	Duodecimal	6903991
16	Hexadecimal	133a5bd
20	Vigesimal	6604j1
36	Base36	c0531

Cryptographic Hash Functions

md5	ad52ae02ed7ad08a3c5290713609446d
sha1	0fac4615112e0f49f24a7c6e8f1e968a66c9073b
sha256	20972b736b91d8b9e5df97f5b1b4a5889b6746ba7ae7423e0ccbfb909253d433
sha512	dfc60895af78f5f392dad108b89473a6b258661261ab05327089df017a6f6527f430077f043dd8cf6d93601f6c47eb8780844721ba226962a3a4a9a96fb51383
ripemd-160	62e1d0ea66ee367c1f24008e4b48efeaacc587a8

20161981 as geometric shapes

Circle

Radius = n

Diameter	40323962
Circumference	126681462.78283
Area	1.2770746228399E+15

Sphere

Radius = n

Volume	3.4331139041706E+22
Surface area	5.1082984913594E+15
Circumference	126681462.78283

Square

Length = n

Perimeter	80647924
Area	406505477844361
Diagonal	28513346.974509

Cube

Length = n

Surface area	2439032867066166
Volume	8.1959557206939E+21
Space diagonal	34921575.473238

Equilateral Triangle

Length = n

Perimeter	60485943
Area	1.7602203529537E+14
Altitude	17460787.736619

Triangular Pyramid

Length = n

Surface area	1.7602203529537E+14
Volume	9.6590264473456E+20
Height	9504448.9915029