20170987 is an odd 8-digits composite number following 20170986
and preceding 20170988 . In scientific notation, it is written as 2.0170987 × 10^7.
The sum of its digits is 34. It has a total of 3 prime factors and 8 positive divisors.
There are 19367400 positive integers (up to 20170987) that are relatively prime to 20170987.
20170987 has 8 divisors, whose sum is 20984832
The reverse of 20170987 is 78907102
Previous prime number is 31
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 34
Digital Root 7
Name
twenty million one hundred seventy thousand nine hundred eighty-seven
Scientific notation
2.0170987 × 10^7
Engineering notation
2.0170987 × 10^6
Prime Factorization
131 × 31 × 4967
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
20170987
Product of the distinct prime numbers
The prime factorization of 20170987 is 131 × 31 × 4967.
Since it has a total of 3 prime factors.
10 , 8 , 57 , 65 , 54 , 844 , 5856 , 2400 , 79547 , 28907 , 658019 , 481323 , 1963686 , 6146597 , 64259502 , 74823383 , 399918080 , 106580578 , 860742947 , 3695976709
n×2
40341974
n×3
60512961
n×4
80683948
n×5
100854935
n÷2
10085493.5
n÷3
6723662.3333333
n÷3
5042746.75
n÷5
4034197.4
n2
406868716554169
n3
8.2069435923208E+21
n4
1.6554215251044E+29
n5
3.33914860624E+36
2 √n
4491.212197169
3 √n
272.21311782839
4 √n
67.016506900681
5 √n
28.903166845924
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
-20170986
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 20170987 can be divided by 8 positive divisors.
The sum of these divisors (counting 20170987) is 1, the average is 0.125.
Base
System
Value
2
Binary
1001100111100100011101011
3
Ternary
1101221210101121
4
Quaternary
1030330203223
5
Quinary
20130432422
6
Senary
2000200111
8
Octal
114744353
10
Decimal
20170987
12
Duodecimal
6909037
16
Hexadecimal
133c8eb
20
Vigesimal
661797
36
Base36
c0c17
md5
805e270f437ac2279fff1987fece704c
sha1
252332dd13e7a14b227b376a5f3eb79536e03586
sha256
ea27649f97fe184819a0211ab899bb97a357f7b5ac8279ef59d01aab231fb04d
sha512
93724f1d3c00dce7c51ccee462288eff3964712a05646a16eb06fd2bb7ebc10f291e8ce18d7f9ee49f18a8f4c08e827c8525b4350def8a17c530fd07a01e44e1
ripemd-160
a38eeb8c2ff8b90b3f84a8f03751ce32768a0f51
Diameter
40341974
Circumference
126738049.14971
Area
1.2782157709021E+15
Volume
3.4377164930748E+22
Surface area
5.1128630836083E+15
Circumference
126738049.14971
Perimeter
80683948
Area
406868716554169
Diagonal
28526083.381851
Surface area
2441212299325014
Volume
8.2069435923208E+21
Space diagonal
34937174.322811
Perimeter
60512961
Area
1.7617932227054E+14
Altitude
17468587.161406
Surface area
1.7617932227054E+14
Volume
9.6719757782426E+20
Height
9508694.4606171