20856621 is an odd 8-digits composite number following 20856620
and preceding 20856622 . In scientific notation, it is written as 2.0856621 × 10^7.
The sum of its digits is 30. It has a total of 2 prime factors and 4 positive divisors.
There are 13904412 positive integers (up to 20856621) that are relatively prime to 20856621.
20856621 has 4 divisors, whose sum is 27808832
The reverse of 20856621 is 12665802
Previous prime number is 3
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 30
Digital Root 3
Name
twenty million eight hundred fifty-six thousand six hundred twenty-one
Scientific notation
2.0856621 × 10^7
Engineering notation
2.0856621 × 10^6
Prime Factorization
3 × 6952207
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
20856621
Product of the distinct prime numbers
The prime factorization of 20856621 is 3 × 6952207.
Since it has a total of 2 prime factors.
8 , 5 , 72 , 100 , 820 , 894 , 5080 , 1844 , 21447 , 87580 , 840129 , 282296 , 4074096 , 5648013 , 39403828 , 16768923 , 952821839 , 945819817 , 4496614109 , 9567238146
n×2
41713242
n×3
62569863
n×4
83426484
n×5
104283105
n÷2
10428310.5
n÷3
6952207
n÷3
5214155.25
n÷5
4171324.2
n2
434998639537641
n3
9.0726017603522E+21
n4
1.892238163996E+29
n5
3.94656942282E+36
2 √n
4566.9049694514
3 √n
275.26309147179
4 √n
67.578879610803
5 √n
29.097038578916
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
-20856620
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 20856621 can be divided by 4 positive divisors.
The sum of these divisors (counting 20856621) is 1, the average is 0.25.
Base
System
Value
2
Binary
1001111100011111100101101
3
Ternary
1110020121220110
4
Quaternary
1033203330231
5
Quinary
20314402441
6
Senary
2023010233
8
Octal
117437455
10
Decimal
20856621
12
Duodecimal
6b99979
16
Hexadecimal
13e3f2d
20
Vigesimal
6a71b1
36
Base36
cf12l
md5
5c657f2c339b4d6e373cd951d5e75018
sha1
24cea8d2d321074a4ffc749c286aa82c324465cb
sha256
b88c65369c942d0e3d980c6572a5529cc25afe6fdfa7f80cc2a5b7a4c0d5c917
sha512
22a694f5fff6a2c7c3229e4610e5dd917450a61a52b38d27b25b1f30b1d2101e6e6ee86de3bffa0a1eb2b0c4d972296720489fa667e890192c090d3d43647669
ripemd-160
e66892036e7ff455ef464a3fb451345cbb319113
Diameter
41713242
Circumference
131046014.62461
Area
1.366588530293E+15
Volume
3.8003225385691E+22
Surface area
5.466354121172E+15
Circumference
131046014.62461
Perimeter
83426484
Area
434998639537641
Diagonal
29495716.283476
Surface area
2609991837225846
Volume
9.0726017603522E+21
Space diagonal
36124727.246208
Perimeter
62569863
Area
1.8835993622563E+14
Altitude
18062363.623104
Surface area
1.8835993622563E+14
Volume
1.0692163712917E+21
Height
9831905.4278252