21631411632408 has 32 divisors (see below), whose sum is σ = 54098882469360. Its totient is φ = 7207756759040.

The previous prime is 21631411632361. The next prime is 21631411632427. The reversal of 21631411632408 is 80423611413612.

It is a super-2 number, since 2×21631411632408² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21631411632408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169546473 + ... + 169674008.

Almost surely, 2^{21631411632408} is an apocalyptic number.

It is an amenable number.

21631411632408 is an abundant number, since it is smaller than the sum of its proper divisors (32467470836952).

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

21631411632408 is a wasteful number, since it uses less digits than its factorization.

21631411632408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339223147 (or 339223143 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 21631411632408 in words is "twenty-one trillion, six hundred thirty-one billion, four hundred eleven million, six hundred thirty-two thousand, four hundred eight".