21304210432 has 44 divisors (see below), whose sum is σ = 42606872100. Its totient is φ = 10647289856.

The previous prime is 21304210429. The next prime is 21304210451. The reversal of 21304210432 is 23401240312.

It can be written as a sum of positive squares in 2 ways, for example, as 4698279936 + 16605930496 = 68544^2 + 128864^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3639444 + ... + 3645292.

Almost surely, 2^21304210432 is an apocalyptic number.

It is an amenable number.

21304210432 is a deficient number, since it is larger than the sum of its proper divisors (21302661668).

21304210432 is an equidigital number, since it uses as much as digits as its factorization.

21304210432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426 (or 9408 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21304210432 its reverse (23401240312), we get a palindrome (44705450744).

The spelling of 21304210432 in words is "twenty-one billion, three hundred four million, two hundred ten thousand, four hundred thirty-two".