21631368896 has 28 divisors (see below), whose sum is σ = 43128209400. Its totient is φ = 10764418560.

The previous prime is 21631368851. The next prime is 21631368911. The reversal of 21631368896 is 69886313612.

It is a super-2 number, since 2×21631368896² (a number of 21 digits) contains 22 as substring.

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, 787421 + ... + 814428.

Almost surely, 2^21631368896 is an apocalyptic number.

It is an amenable number.

21631368896 is a deficient number, since it is larger than the sum of its proper divisors (21496840504).

21631368896 is a wasteful number, since it uses less digits than its factorization.

21631368896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602072 (or 1602062 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The spelling of 21631368896 in words is "twenty-one billion, six hundred thirty-one million, three hundred sixty-eight thousand, eight hundred ninety-six".