Base | Representation |
---|---|
bin | 10100000011011010… |
… | …110111010001000000 |
3 | 2001120121122121120011 |
4 | 110003122313101000 |
5 | 323044221211430 |
6 | 13520341554304 |
7 | 1361405524102 |
oct | 240332672100 |
9 | 61517577504 |
10 | 21532210240 |
11 | 914a40a282 |
12 | 420b115994 |
13 | 2051c66c08 |
14 | 10839b1572 |
15 | 86052922a |
hex | 5036b7440 |
21532210240 has 28 divisors (see below), whose sum is σ = 51273576396. Its totient is φ = 8612883968.
The previous prime is 21532210223. The next prime is 21532210241. The reversal of 21532210240 is 4201223512.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 9715650624 + 11816559616 = 98568^2 + 108704^2 .
It is not an unprimeable number, because it can be changed into a prime (21532210241) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33643759 + ... + 33644398.
It is an arithmetic number, because the mean of its divisors is an integer number (1831199157).
Almost surely, 221532210240 is an apocalyptic number.
21532210240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
21532210240 is an abundant number, since it is smaller than the sum of its proper divisors (29741366156).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21532210240 is an equidigital number, since it uses as much as digits as its factorization.
21532210240 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 67288174 (or 67288164 counting only the distinct ones).
The product of its (nonzero) digits is 960, while the sum is 22.
Adding to 21532210240 its reverse (4201223512), we get a palindrome (25733433752).
The spelling of 21532210240 in words is "twenty-one billion, five hundred thirty-two million, two hundred ten thousand, two hundred forty".
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