18008630646936 has 72 divisors (see below), whose sum is σ = 46522399118940. Its totient is φ = 5809027796640.

The previous prime is 18008630646901. The next prime is 18008630646949. The reversal of 18008630646936 is 63964603680081.

It is a self number, because there is not a number n which added to its sum of digits gives 18008630646936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 644463381 + ... + 644491323.

Almost surely, 2^{18008630646936} 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 18008630646936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23261199559470).

18008630646936 is an abundant number, since it is smaller than the sum of its proper divisors (28513768472004).

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

18008630646936 is an frugal number, since it uses more digits than its factorization.

18008630646936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55957 (or 27979 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 60.

The spelling of 18008630646936 in words is "eighteen trillion, eight billion, six hundred thirty million, six hundred forty-six thousand, nine hundred thirty-six".