21631462160 has 80 divisors (see below), whose sum is σ = 62703165312. Its totient is φ = 6742272000.

The previous prime is 21631462147. The next prime is 21631462163. The reversal of 21631462160 is 6126413612.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (21631462163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749641 + ... + 1761960.

Almost surely, 2^21631462160 is an apocalyptic number.

21631462160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21631462160 is an abundant number, since it is smaller than the sum of its proper divisors (41071703152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21631462160 is a wasteful number, since it uses less digits than its factorization.

21631462160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511632 (or 3511626 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 21631462160 its reverse (6126413612), we get a palindrome (27757875772).

The spelling of 21631462160 in words is "twenty-one billion, six hundred thirty-one million, four hundred sixty-two thousand, one hundred sixty".