20997988 is an even 8-digits composite number following 20997987
and preceding 20997989 . In scientific notation, it is written as 2.0997988 × 10^7.
The sum of its digits is 52. It has a total of 5 prime factors and 24 positive divisors.
There are 9129120 positive integers (up to 20997988) that are relatively prime to 20997988.
20997988 has 24 divisors, whose sum is 41832000
The reverse of 20997988 is 88979902
Previous prime number is 11
Is Prime? no
Number parity even
Number length 8
Sum of Digits 52
Digital Root 7
Name
twenty million nine hundred ninety-seven thousand nine hundred eighty-eight
Scientific notation
2.0997988 × 10^7
Engineering notation
2.0997988 × 10^6
Prime Factorization
2 × 2 × 23 × 11 × 20749
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
5
Total number of prime factors
rad
Radical
10498994
Product of the distinct prime numbers
The prime factorization of 20997988 is 2 × 2 × 23 × 11 × 20749.
Since it has a total of 5 prime factors.
3 , 8 , 66 , 48 , 4 , 563 , 9750 , 5771 , 26645 , 68036 , 820324 , 292780 , 4206474 , 5752260 , 88434252 , 93586630 , 410273024 , 150530787 , 6416911557 , 4330402173
n×2
41995976
n×3
62993964
n×4
83991952
n×5
104989940
n÷2
10498994
n÷3
6999329.3333333
n÷3
5249497
n÷5
4199597.6
n2
440915500048144
n3
9.2583383790249E+21
n4
1.944064781827E+29
n5
4.0821448960027E+36
2 √n
4582.3561624998
3 √n
275.88360631632
4 √n
67.69310276904
5 √n
29.136376245198
1 , 2 , 4 , 11 , 22 , 23 , 44 , 46 , 92 , 253 , 506 , 1012 , 20749 , 41498 , 82996 , 228239 , 456478 , 477227 , 912956 , 954454 , 1908908 , 5249497 , 10498994 , 20997988
24 divisors
τ
Total Divisors
24
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-20997987
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.041666666666667
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
24
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 20997988 can be divided by 24 positive divisors.
The sum of these divisors (counting 20997988) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
1010000000110011101100100
3
Ternary
1110111210211021
4
Quaternary
1100012131210
5
Quinary
20333413423
6
Senary
2030020524
8
Octal
120063544
10
Decimal
20997988
12
Duodecimal
7047744
16
Hexadecimal
1406764
20
Vigesimal
6b4ej8
36
Base36
ci25g
md5
5d032e8eba3f442fbffdbdbf781dd3f0
sha1
818aa9a8ebdc60de790a2b503b22fc01226ac99d
sha256
619ecfa72c394a0989480373700c6012e03d167ccdf8b49f11c76fd930c8fd37
sha512
2a19ef6e9e88fcb0497288be17c8b6bd8a3e1b871b63dba2bd7876220f1700ad7f300a058db27ac4c2b4bb2f54c51754f54c611b406760a1c8318ec6fe517906
ripemd-160
24823126bd7a7162d33b09558ba7abdcda49efe5
Diameter
41995976
Circumference
131934249.68193
Area
1.3851768958051E+15
Volume
3.8781237114658E+22
Surface area
5.5407075832205E+15
Circumference
131934249.68193
Perimeter
83991952
Area
440915500048144
Diagonal
29695639.412148
Surface area
2645493000288864
Volume
9.2583383790249E+21
Space diagonal
36369582.072722
Perimeter
62993964
Area
1.9092201198201E+14
Altitude
18184791.036361
Surface area
1.9092201198201E+14
Volume
1.0911056417214E+21
Height
9898546.4707158