21690815 is an odd 8-digits composite number following 21690814
and preceding 21690816 . In scientific notation, it is written as 2.1690815 × 10^7.
The sum of its digits is 32. It has a total of 3 prime factors and 8 positive divisors.
There are 17287072 positive integers (up to 21690815) that are relatively prime to 21690815.
21690815 has 8 divisors, whose sum is 26127360
The reverse of 21690815 is 51809612
Previous prime number is 269
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 32
Digital Root 5
Name
twenty-one million six hundred ninety thousand eight hundred fifteen
Scientific notation
2.1690815 × 10^7
Engineering notation
2.1690815 × 10^6
Prime Factorization
5 × 269 × 16127
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
21690815
Product of the distinct prime numbers
The prime factorization of 21690815 is 5 × 269 × 16127.
Since it has a total of 3 prime factors.
5 , 9 , 66 , 39 , 269 , 650 , 8942 , 7188 , 53948 , 17374 , 733326 , 300989 , 8664658 , 8746247 , 89465662 , 36511538 , 536632473 , 931829267 , 1282323582 , 687739613
n×2
43381630
n×3
65072445
n×4
86763260
n×5
108454075
n÷2
10845407.5
n÷3
7230271.6666667
n÷3
5422703.75
n÷5
4338163
n2
470491455364225
n3
1.0205343117386E+22
n4
2.2136220957075E+29
n5
4.8015267357903E+36
2 √n
4657.3399059978
3 √n
278.88508604613
4 √n
68.24470606573
5 √n
29.326158268403
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
-21690814
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 21690815 can be divided by 8 positive divisors.
The sum of these divisors (counting 21690815) is 1, the average is 0.125.
Base
System
Value
2
Binary
1010010101111100110111111
3
Ternary
1111211000012112
4
Quaternary
1102233212333
5
Quinary
21023101230
6
Senary
2052524235
8
Octal
122574677
10
Decimal
21690815
12
Duodecimal
732067b
16
Hexadecimal
14af9bf
20
Vigesimal
6fb70f
36
Base36
cwwqn
md5
6e79bdccfa15628a0f0637e6a00d1793
sha1
ce228d663207d3fb0d8cc9b7f8a58e5a9073f41d
sha256
cb464c2d5f6985fcc1fad3d3d9c7c0578aa0c6d8fdc323e19953fedff543ab18
sha512
343a7daf4d704da5482a3b7a4b46c59e9eab231267b1e3a12853bec2b3b716e4b7f822c8fc015155e066ceb914a0d03425a48e236eaed1a5f9ea39fcfb1ace64
ripemd-160
961fb458a1e8c35e59ec8aee5efda1c4e5980503
Diameter
43381630
Circumference
136287410.10875
Area
1.478092499749E+15
Volume
4.2748041286591E+22
Surface area
5.9123699989961E+15
Circumference
136287410.10875
Perimeter
86763260
Area
470491455364225
Diagonal
30675444.751926
Surface area
2822948732185350
Volume
1.0205343117386E+22
Space diagonal
37569593.637577
Perimeter
65072445
Area
2.0372877630447E+14
Altitude
18784796.818789
Surface area
2.0372877630447E+14
Volume
1.2027112204399E+21
Height
10225148.250642