17988934918 has 32 divisors (see below), whose sum is σ = 27857128320. Its totient is φ = 8708212800.

The previous prime is 17988934883. The next prime is 17988934919. The reversal of 17988934918 is 81943988971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17988934919) 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, 9052321 + ... + 9054307.

It is an arithmetic number, because the mean of its divisors is an integer number (870535260).

Almost surely, 2^17988934918 is an apocalyptic number.

17988934918 is a deficient number, since it is larger than the sum of its proper divisors (9868193402).

17988934918 is a wasteful number, since it uses less digits than its factorization.

17988934918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172.

The product of its digits is 31352832, while the sum is 67.

The spelling of 17988934918 in words is "seventeen billion, nine hundred eighty-eight million, nine hundred thirty-four thousand, nine hundred eighteen".