21031322304 has 28 divisors (see below), whose sum is σ = 55645374104. Its totient is φ = 7010440704.

The previous prime is 21031322293. The next prime is 21031322327. The reversal of 21031322304 is 40322313012.

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, 54768877 + ... + 54769260.

Almost surely, 2^21031322304 is an apocalyptic number.

21031322304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21031322304 is an abundant number, since it is smaller than the sum of its proper divisors (34614051800).

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

21031322304 is a wasteful number, since it uses less digits than its factorization.

21031322304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109538152 (or 109538142 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21031322304 its reverse (40322313012), we get a palindrome (61353635316).

The spelling of 21031322304 in words is "twenty-one billion, thirty-one million, three hundred twenty-two thousand, three hundred four".