21491389 is an odd 8-digits composite number following 21491388
and preceding 21491390 . In scientific notation, it is written as 2.1491389 × 10^7.
The sum of its digits is 37. It has a total of 2 prime factors and 4 positive divisors.
There are 21170556 positive integers (up to 21491389) that are relatively prime to 21491389.
21491389 has 4 divisors, whose sum is 21812224
The reverse of 21491389 is 98319412
Previous prime number is 67
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 37
Digital Root 1
Name
twenty-one million four hundred ninety-one thousand three hundred eighty-nine
Scientific notation
2.1491389 × 10^7
Engineering notation
2.1491389 × 10^6
Prime Factorization
67 × 320767
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
21491389
Product of the distinct prime numbers
The prime factorization of 21491389 is 67 × 320767.
Since it has a total of 2 prime factors.
1 , 3 , 35 , 13 , 833 , 986 , 8550 , 4088 , 26538 , 95330 , 400298 , 187330 , 419805 , 1411454 , 81005910 , 50614923 , 528570003 , 417441487 , 715035591 , 9570717096
n×2
42982778
n×3
64474167
n×4
85965556
n×5
107456945
n÷2
10745694.5
n÷3
7163796.3333333
n÷3
5372847.25
n÷5
4298277.8
n2
461879801149321
n3
9.9264384777427E+21
n4
2.1333295070974E+29
n5
4.5848214302208E+36
2 √n
4635.8806067456
3 √n
278.02776062857
4 √n
68.087301361896
5 √n
29.272033736932
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-21491388
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
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
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21491389 can be divided by 4 positive divisors.
The sum of these divisors (counting 21491389) is 1, the average is 0.25.
Base
System
Value
2
Binary
1010001111110111010111101
3
Ternary
1111102212122101
4
Quaternary
1101332322331
5
Quinary
21000211024
6
Senary
2044345101
8
Octal
121767275
10
Decimal
21491389
12
Duodecimal
7245191
16
Hexadecimal
147eebd
20
Vigesimal
6e6899
36
Base36
csmv1
md5
4271a35d98101c70ebae67935d8578fb
sha1
ec13e5f4c743cb1ab600f2759263a442ddaa1255
sha256
cefd313ceaba79690fe547740accd61a3038d3f9917def610136c35e1faf2c4c
sha512
073fa75911cc2f234e01910cd69ea135e027fb39f5912ef7423d3a5d6dc5c3c65ec6acb319c0871565272f8d2de7c038d21551fdebc5342b95da1ae635385b52
ripemd-160
9e2ff5f889f25a7a7fbbbe2f52c3b2f5bb17148c
Diameter
42982778
Circumference
135034379.59568
Area
1.4510381901322E+15
Volume
4.1579768263983E+22
Surface area
5.8041527605289E+15
Circumference
135034379.59568
Perimeter
85965556
Area
461879801149321
Diagonal
30393413.798036
Surface area
2771278806895926
Volume
9.9264384777427E+21
Space diagonal
37224177.673227
Perimeter
64474167
Area
1.9999982064511E+14
Altitude
18612088.836613
Surface area
1.9999982064511E+14
Volume
1.1698419934405E+21
Height
10131137.932679