21631563503152 has 20 divisors (see below), whose sum is σ = 41968803765616. Its totient is φ = 10800904466880.

The previous prime is 21631563503129. The next prime is 21631563503159. The reversal of 21631563503152 is 25130536513612.

It is a junction number, because it is equal to n+sod(n) for n = 21631563503099 and 21631563503108.

It is not an unprimeable number, because it can be changed into a prime (21631563503159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929818299 + ... + 929841562.

Almost surely, 2^{21631563503152} is an apocalyptic number.

It is an amenable number.

21631563503152 is a deficient number, since it is larger than the sum of its proper divisors (20337240262464).

21631563503152 is a wasteful number, since it uses less digits than its factorization.

21631563503152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859660596 (or 1859660590 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 21631563503152 in words is "twenty-one trillion, six hundred thirty-one billion, five hundred sixty-three million, five hundred three thousand, one hundred fifty-two".