20457981 is an odd 8-digits composite number following 20457980
and preceding 20457982 . In scientific notation, it is written as 2.0457981 × 10^7.
The sum of its digits is 36. It has a total of 4 prime factors and 16 positive divisors.
There are 13072752 positive integers (up to 20457981) that are relatively prime to 20457981.
20457981 has 16 divisors, whose sum is 22116864
The reverse of 20457981 is 18975402
Previous prime number is 263
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 36
Digital Root 9
Name
twenty million four hundred fifty-seven thousand nine hundred eighty-one
Scientific notation
2.0457981 × 10^7
Engineering notation
2.0457981 × 10^6
Prime Factorization
27 × 67 × 263 × 43
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
20457981
Product of the distinct prime numbers
The prime factorization of 20457981 is 27 × 67 × 263 × 43.
Since it has a total of 4 prime factors.
3 , 8 , 38 , 24 , 754 , 743 , 9916 , 5958 , 65987 , 93968 , 731618 , 920145 , 5553960 , 9047419 , 41102169 , 25717450 , 901132067 , 72960826 , 7074866154 , 2713192924
n×2
40915962
n×3
61373943
n×4
81831924
n×5
102289905
n÷2
10228990.5
n÷3
6819327
n÷3
5114495.25
n÷5
4091596.2
n2
418528986596361
n3
8.5622580557376E+21
n4
1.7516651262138E+29
n5
3.5835531870444E+36
2 √n
4523.0499665602
3 √n
273.49806432706
4 √n
67.253624189037
5 √n
28.984949909953
1 , 27 , 43 , 67 , 263 , 1161 , 1809 , 2881 , 7101 , 11309 , 17621 , 77787 , 305343 , 475767 , 757703 , 20457981
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-20457980
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 20457981 can be divided by 16 positive divisors.
The sum of these divisors (counting 20457981) is 1, the average is 0.0625.
Base
System
Value
2
Binary
1001110000010100111111101
3
Ternary
1102111101002000
4
Quaternary
1032002213331
5
Quinary
20214123411
6
Senary
2010252513
8
Octal
116024775
10
Decimal
20457981
12
Duodecimal
6a27139
16
Hexadecimal
13829fd
20
Vigesimal
67h4j1
36
Base36
c6hh9
md5
067697f1d2e19578d6d05b06e84dd664
sha1
a545003543638f9ab0991064cea242f0d39d310c
sha256
2cc132072e4bd9bae6ddb3fcf7e1f642442419bbe41cd394b81b057ec82c8dba
sha512
28a5ec0f68b2516f7ecd4971ea8b397478bd338b2b17a028614be663f51f4de9650261befd4358ce05955db579e739774c6a5ac5459d0acd344ef81e3b5b0e1a
ripemd-160
621030ab9952d21446850ecbf7821f877b46d2cb
Diameter
40915962
Circumference
128541285.63376
Area
1.3148475896055E+15
Volume
3.5865502674727E+22
Surface area
5.259390358422E+15
Circumference
128541285.63376
Perimeter
81831924
Area
418528986596361
Diagonal
28931954.188971
Surface area
2511173919578166
Volume
8.5622580557376E+21
Space diagonal
35434262.512279
Perimeter
61373943
Area
1.812283673063E+14
Altitude
17717131.256139
Surface area
1.812283673063E+14
Volume
1.0090717889135E+21
Height
9643984.729657