21503904304 has 10 divisors (see below), whose sum is σ = 41663814620. Its totient is φ = 10751952144.

The previous prime is 21503904293. The next prime is 21503904329. The reversal of 21503904304 is 40340930512.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671996994 + ... + 671997025.

It is an arithmetic number, because the mean of its divisors is an integer number (4166381462).

Almost surely, 2^21503904304 is an apocalyptic number.

It is an amenable number.

21503904304 is a deficient number, since it is larger than the sum of its proper divisors (20159910316).

21503904304 is a wasteful number, since it uses less digits than its factorization.

21503904304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343994027 (or 1343994021 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 21503904304 in words is "twenty-one billion, five hundred three million, nine hundred four thousand, three hundred four".