21631563503108 has 96 divisors (see below), whose sum is σ = 42228701233152. Its totient is φ = 9628160256000.

The previous prime is 21631563503087. The next prime is 21631563503129. The reversal of 21631563503108 is 80130536513612.

It is an interprime number because it is at equal distance from previous prime (21631563503087) and next prime (21631563503129).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 741478010 + ... + 741507182.

It is an arithmetic number, because the mean of its divisors is an integer number (439882304512).

Almost surely, 2^{21631563503108} is an apocalyptic number.

It is an amenable number.

21631563503108 is a deficient number, since it is larger than the sum of its proper divisors (20597137730044).

21631563503108 is a wasteful number, since it uses less digits than its factorization.

21631563503108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30805 (or 30803 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 21631563503108 in words is "twenty-one trillion, six hundred thirty-one billion, five hundred sixty-three million, five hundred three thousand, one hundred eight".