21856987 is an odd 8-digits prime number following 21856986
and preceding 21856988 . In scientific notation, it is written as 2.1856987 × 10^7.
The sum of its digits is 46. It has a total of 1 prime factors and 2 positive divisors.
There are 21856986 positive integers (up to 21856987) that are relatively prime to 21856987.
21856987 has 2 divisors, whose sum is 21856988
The reverse of 21856987 is 78965812
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 46 Digital Root 1
Name
twenty-one million eight hundred fifty-six thousand nine hundred eighty-seven
Scientific notation
2.1856987 × 10^7
Engineering notation
2.1856987 × 10^6
Prime Factorization
21856987
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21856987 Product of the distinct prime numbers
The prime factorization of 21856987 is 21856987.
Since it has a total of 1 prime factors.
2 , 10 , 71 , 54 , 375 , 186 , 9224 , 1000 , 86799 , 81101 , 712498 , 855269 , 4772382 , 2520737 , 84108027 , 15983717 , 45172194 , 233501043 , 285626704 , 1900648873
n×2
43713974
n×3
65570961
n×4
87427948
n×5
109284935
n÷2
10928493.5
n÷3
7285662.3333333
n÷3
5464246.75
n÷5
4371397.4
n2
477727880718169
n3
1.0441692078395E+22
n4
2.2822392801547E+29
n5
4.9882874277231E+36
2 √n4675.1456661798
3 √n279.59544893919
4 √n68.375036864194
5 √n29.370954384871
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21856988 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10928494 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4675.1457731284 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999084961 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21856987 can be divided by 2 positive divisors.
The sum of these divisors (counting 21856987) is 21856988, the average is 10928494.
Base
System
Value
2
Binary
1010011011000001011011011
3
Ternary
1112010110011001
4
Quaternary
1103120023123
5
Quinary
21043410422
6
Senary
2100245431
8
Octal
123301333
10
Decimal
21856987
12
Duodecimal
73a0877
16
Hexadecimal
14d82db
20
Vigesimal
6gc297
36
Base36
d0gyj
md5
82c270cbd4f817acd2e12f33ee6ce315
sha1
9a89cd67876458783732da2bf2967c1ab56bd50f
sha256
4a967db6933f0c2ae0642c1464b2ec3a9e0890c846c4e435ccb58ef4429455d0
sha512
73793a66341f96fb6b4fd756be4f8b603b14d0d262f4f0e7ca0ffbdf584725d62c71788ceff85d51119bc348254971cf44dc79c4400d963e37c26a4ad4bfe14c
ripemd-160
35419e975b49a9058e4b21b1b5f8e26d0db253b9
Diameter
43713974
Circumference
137331499.57762
Area
1.5008264004792E+15
Volume
4.3738057499375E+22
Surface area
6.0033056019169E+15
Circumference
137331499.57762
Perimeter
87427948
Area
477727880718169
Diagonal
30910447.448012
Surface area
2866367284309014
Volume
1.0441692078395E+22
Space diagonal
37857411.984372
Perimeter
65570961
Area
2.0686224039902E+14
Altitude
18928705.992186
Surface area
2.0686224039902E+14
Volume
1.2305652126158E+21
Height
10303482.482671