20921709 is an odd 8-digits composite number following 20921708
and preceding 20921710 . In scientific notation, it is written as 2.0921709 × 10^7.
The sum of its digits is 30. It has a total of 3 prime factors and 8 positive divisors.
There are 13929920 positive integers (up to 20921709) that are relatively prime to 20921709.
20921709 has 8 divisors, whose sum is 27931392
The reverse of 20921709 is 90712902
Previous prime number is 863
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 30
Digital Root 3
Name
twenty million nine hundred twenty-one thousand seven hundred nine
Scientific notation
2.0921709 × 10^7
Engineering notation
2.0921709 × 10^6
Prime Factorization
3 × 863 × 8081
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
20921709
Product of the distinct prime numbers
The prime factorization of 20921709 is 3 × 863 × 8081.
Since it has a total of 3 prime factors.
6 , 5 , 72 , 39 , 978 , 167 , 4919 , 4345 , 50557 , 73552 , 897123 , 618930 , 9518646 , 9802035 , 43971012 , 88068969 , 424346635 , 830148511 , 4674969284 , 4147213449
n×2
41843418
n×3
62765127
n×4
83686836
n×5
104608545
n÷2
10460854.5
n÷3
6973903
n÷3
5230427.25
n÷5
4184341.8
n2
437717907480681
n3
9.1578066843997E+21
n4
1.9159696652927E+29
n5
4.008535979008E+36
2 √n
4574.0254699772
3 √n
275.54913523335
4 √n
67.631541975451
5 √n
29.115176784136
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
-20921708
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 20921709 can be divided by 8 positive divisors.
The sum of these divisors (counting 20921709) is 1, the average is 0.125.
Base
System
Value
2
Binary
1001111110011110101101101
3
Ternary
1110100221012010
4
Quaternary
1033303311231
5
Quinary
20323443314
6
Senary
2024231433
8
Octal
117636555
10
Decimal
20921709
12
Duodecimal
700b579
16
Hexadecimal
13f3d6d
20
Vigesimal
6af459
36
Base36
cgfal
md5
cd7c03d13cc21a34f5245518835ec175
sha1
792ae751e7f6e7aeb3da0a9fce6a5c506607899d
sha256
ebc180994d1e85a50db653799d9207af01c79b238aef9888c8c89075cd111564
sha512
9ec09b3e695b385c566a6c58700b23dfece1d5b76a18e1bf0cee027c7288d8fbe320ef065064f7beac6c1aef0f32efa8beded7b707e2db839b7aff9da12463fb
ripemd-160
f6f6d6d7d2bc964784856a4a1d565c7b0e2708ee
Diameter
41843418
Circumference
131454974.58989
Area
1.375131362486E+15
Volume
3.8360130936941E+22
Surface area
5.500525449944E+15
Circumference
131454974.58989
Perimeter
83686836
Area
437717907480681
Diagonal
29587764.615823
Surface area
2626307444884086
Volume
9.1578066843997E+21
Space diagonal
36237462.969171
Perimeter
62765127
Area
1.8953741378482E+14
Altitude
18118731.484586
Surface area
1.8953741378482E+14
Volume
1.0792578678891E+21
Height
9862588.2052744