21300563056 has 10 divisors (see below), whose sum is σ = 41269840952. Its totient is φ = 10650281520.

The previous prime is 21300563027. The next prime is 21300563069. The reversal of 21300563056 is 65036500312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665642580 + ... + 665642611.

Almost surely, 2^21300563056 is an apocalyptic number.

It is an amenable number.

21300563056 is a deficient number, since it is larger than the sum of its proper divisors (19969277896).

21300563056 is a wasteful number, since it uses less digits than its factorization.

21300563056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331285199 (or 1331285193 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 21300563056 in words is "twenty-one billion, three hundred million, five hundred sixty-three thousand, fifty-six".