20781471 is an odd 8-digits composite number following 20781470
and preceding 20781472 . In scientific notation, it is written as 2.0781471 × 10^7.
The sum of its digits is 30. It has a total of 3 prime factors and 8 positive divisors.
There are 13801112 positive integers (up to 20781471) that are relatively prime to 20781471.
20781471 has 8 divisors, whose sum is 27815040
The reverse of 20781471 is 17418702
Previous prime number is 263
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 30
Digital Root 3
Name
twenty million seven hundred eighty-one thousand four hundred seventy-one
Scientific notation
2.0781471 × 10^7
Engineering notation
2.0781471 × 10^6
Prime Factorization
3 × 263 × 26339
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
20781471
Product of the distinct prime numbers
The prime factorization of 20781471 is 3 × 263 × 26339.
Since it has a total of 3 prime factors.
6 , 7 , 90 , 34 , 13 , 817 , 8108 , 4343 , 81387 , 59324 , 283976 , 400773 , 2009248 , 6032401 , 65482736 , 56966116 , 634448831 , 324227017 , 398545674 , 4112181795
n×2
41562942
n×3
62344413
n×4
83125884
n×5
103907355
n÷2
10390735.5
n÷3
6927157
n÷3
5195367.75
n÷5
4156294.2
n2
431869536923841
n3
8.9748842573662E+21
n4
1.8651129692281E+29
n5
3.8759791081738E+36
2 √n
4558.6698717937
3 √n
274.93208681101
4 √n
67.517922596846
5 √n
29.076039963468
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
-20781470
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 20781471 can be divided by 8 positive divisors.
The sum of these divisors (counting 20781471) is 1, the average is 0.125.
Base
System
Value
2
Binary
1001111010001100110011111
3
Ternary
1110002210211010
4
Quaternary
1033101212133
5
Quinary
20310001341
6
Senary
2021230303
8
Octal
117214637
10
Decimal
20781471
12
Duodecimal
6b62393
16
Hexadecimal
13d199f
20
Vigesimal
69hddb
36
Base36
cdf33
md5
ea27229c94b96d23bd5f56e4483d4ade
sha1
e1809f668d5709ccf0db47e3bcc48b0a70617409
sha256
fb1e18bac1822f5fc3ebf2f19468db81ba634d3f24e91f3b31cd2569cfa832cd
sha512
f9d17479d1d3644f7b40571ff80b162f577dd941c5323325e78a3aeaa04786e7f7cb1f182956d39b096f5e0945d8f13f188ec3e9a8b1d31b2ee83d15fc39a0d3
ripemd-160
9b8808686f73ffa14794f42864b9a95f3b7d925f
Diameter
41562942
Circumference
130573833.24878
Area
1.3567581645092E+15
Volume
3.7593907266347E+22
Surface area
5.4270326580367E+15
Circumference
130573833.24878
Perimeter
83125884
Area
431869536923841
Diagonal
29389438.134263
Surface area
2591217221543046
Volume
8.9748842573662E+21
Space diagonal
35994563.628019
Perimeter
62344413
Area
1.8700499504833E+14
Altitude
17997281.81401
Surface area
1.8700499504833E+14
Volume
1.0577002531247E+21
Height
9796479.3780877