21432312304 has 30 divisors (see below), whose sum is σ = 44965060296. Its totient is φ = 9891835200.

The previous prime is 21432312289. The next prime is 21432312359. The reversal of 21432312304 is 40321323412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3960372 + ... + 3965779.

Almost surely, 2^21432312304 is an apocalyptic number.

It is an amenable number.

21432312304 is an abundant number, since it is smaller than the sum of its proper divisors (23532747992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21432312304 is a wasteful number, since it uses less digits than its factorization.

21432312304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926185 (or 7926166 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21432312304 its reverse (40321323412), we get a palindrome (61753635716).

The spelling of 21432312304 in words is "twenty-one billion, four hundred thirty-two million, three hundred twelve thousand, three hundred four".