21887821 is an odd 8-digits prime number following 21887820
and preceding 21887822 . In scientific notation, it is written as 2.1887821 × 10^7.
The sum of its digits is 37. It has a total of 1 prime factors and 2 positive divisors.
There are 21887820 positive integers (up to 21887821) that are relatively prime to 21887821.
21887821 has 2 divisors, whose sum is 21887822
The reverse of 21887821 is 12878812
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 37 Digital Root 1
Name
twenty-one million eight hundred eighty-seven thousand eight hundred twenty-one
Scientific notation
2.1887821 × 10^7
Engineering notation
2.1887821 × 10^6
Prime Factorization
21887821
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21887821 Product of the distinct prime numbers
The prime factorization of 21887821 is 21887821.
Since it has a total of 1 prime factors.
10 , 3 , 67 , 56 , 32 , 23 , 3567 , 1428 , 21351 , 25933 , 306146 , 442683 , 3954157 , 2830612 , 82938294 , 95351280 , 322777443 , 163067776 , 4708304834 , 2592850856
n×2
43775642
n×3
65663463
n×4
87551284
n×5
109439105
n÷2
10943910.5
n÷3
7295940.3333333
n÷3
5471955.25
n÷5
4377564.2
n2
479076708128041
n3
1.0485945232776E+22
n4
2.295144922708E+29
n5
5.0235721237292E+36
2 √n4678.4421552478
3 √n279.72686374792
4 √n68.399138556329
5 √n29.379236527403
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21887822 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10943911 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4678.442262121 Returns the nth root of the product of n divisors
H Harmonic Mean
1.999999908625 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21887821 can be divided by 2 positive divisors.
The sum of these divisors (counting 21887821) is 21887822, the average is 10943911.
Base
System
Value
2
Binary
1010011011111101101001101
3
Ternary
1112012000110001
4
Quaternary
1103133231031
5
Quinary
21100402241
6
Senary
2101044301
8
Octal
123375515
10
Decimal
21887821
12
Duodecimal
73b6691
16
Hexadecimal
14dfb4d
20
Vigesimal
6gfjb1
36
Base36
d14r1
md5
b3ad965bd8bb7904ae8510c575bab312
sha1
ddd7868d44b0d999e4ba9f0ed2c8495a048d60e0
sha256
fe87cdfefd4942974cb791c9381d4af54e96cbf1d0d9a455a93557c140924b96
sha512
b67612ddee5b4dd41c4a0efb7e7f589ffca80599be0722884cb3cbbd6abe210a5273361b46b33c8eb7e46724bab2e8692d94e506e78a2b46dfd00d31336688dc
ripemd-160
198f3df7d294a68992b5c21d164b77c68c3194fe
Diameter
43775642
Circumference
137525235.31338
Area
1.505063866761E+15
Volume
4.3923424678978E+22
Surface area
6.0202554670441E+15
Circumference
137525235.31338
Perimeter
87551284
Area
479076708128041
Diagonal
30954053.308995
Surface area
2874460248768246
Volume
1.0485945232776E+22
Space diagonal
37910818.038973
Perimeter
65663463
Area
2.0744629980015E+14
Altitude
18955409.019487
Surface area
2.0744629980015E+14
Volume
1.2357804968744E+21
Height
10318017.769665