18631402872704 has 128 divisors (see below), whose sum is σ = 38366867397600. Its totient is φ = 9005506560000.

The previous prime is 18631402872703. The next prime is 18631402872809. The reversal of 18631402872704 is 40727820413681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18631402872703) 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, 486173864 + ... + 486212184.

Almost surely, 2^{18631402872704} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18631402872704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19183433698800).

18631402872704 is an abundant number, since it is smaller than the sum of its proper divisors (19735464524896).

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

18631402872704 is a wasteful number, since it uses less digits than its factorization.

18631402872704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39032 (or 39020 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 18631402872704 in words is "eighteen trillion, six hundred thirty-one billion, four hundred two million, eight hundred seventy-two thousand, seven hundred four".