21493487 is an odd 8-digits prime number following 21493486
and preceding 21493488 . In scientific notation, it is written as 2.1493487 × 10^7.
The sum of its digits is 38. It has a total of 1 prime factors and 2 positive divisors.
There are 21493486 positive integers (up to 21493487) that are relatively prime to 21493487.
21493487 has 2 divisors, whose sum is 21493488
The reverse of 21493487 is 78439412
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 38 Digital Root 2
Name
twenty-one million four hundred ninety-three thousand four hundred eighty-seven
Scientific notation
2.1493487 × 10^7
Engineering notation
2.1493487 × 10^6
Prime Factorization
21493487
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
21493487 Product of the distinct prime numbers
The prime factorization of 21493487 is 21493487.
Since it has a total of 1 prime factors.
8 , 8 , 8 , 29 , 584 , 971 , 1354 , 845 , 63654 , 24947 , 962840 , 138316 , 1204377 , 2928193 , 15626299 , 37859998 , 660449062 , 58890538 , 2109554985 , 8376680802
n×2
42986974
n×3
64480461
n×4
85973948
n×5
107467435
n÷2
10746743.5
n÷3
7164495.6666667
n÷3
5373371.75
n÷5
4298697.4
n2
461969983419169
n3
9.9293458330101E+21
n4
2.1341626558031E+29
n5
4.5870597298389E+36
2 √n4636.1068796998
3 √n278.03680740326
4 √n68.088962980059
5 √n29.272605224692
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
21493488 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
10746744 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
4636.1069875489 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999069486 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21493487 can be divided by 2 positive divisors.
The sum of these divisors (counting 21493487) is 21493488, the average is 10746744.
Base
System
Value
2
Binary
1010001111111011011101111
3
Ternary
1111102222112002
4
Quaternary
1101333123233
5
Quinary
21000242422
6
Senary
2044402515
8
Octal
121773357
10
Decimal
21493487
12
Duodecimal
724643b
16
Hexadecimal
147f6ef
20
Vigesimal
6e6de7
36
Base36
csohb
md5
0e5ad246f413b634093a49ff22ecc58e
sha1
eb2ba610338b8137f3136aaaf52ff5f073fa9c18
sha256
e4f751460bb8ac78b8ef0a38b7e41f34e8f59ed8b281296c9deb569ae92c249b
sha512
ca4b7f5ab8443038a9ff80277151471bc1e20f8281d3b9d64653e9e792a40ff39a82b3779bc781cd254f661a50e744f3e5de63f52222ee291f458a009717a1ce
ripemd-160
127c6c842f796e3e3134f70961059b5356a47dbb
Diameter
42986974
Circumference
135047561.71846
Area
1.4513215060887E+15
Volume
4.1591946565249E+22
Surface area
5.8052860243546E+15
Circumference
135047561.71846
Perimeter
85973948
Area
461969983419169
Diagonal
30396380.81809
Surface area
2771819900515014
Volume
9.9293458330101E+21
Space diagonal
37227811.515821
Perimeter
64480461
Area
2.0003887071344E+14
Altitude
18613905.757911
Surface area
2.0003887071344E+14
Volume
1.1701846285446E+21
Height
10132126.939363