18867118018 has 16 divisors (see below), whose sum is σ = 32576322240. Its totient is φ = 8027734896.

The previous prime is 18867118003. The next prime is 18867118019. The reversal of 18867118018 is 81081176881.

It is not an unprimeable number, because it can be changed into a prime (18867118019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4845721 + ... + 4849612.

It is an arithmetic number, because the mean of its divisors is an integer number (2036020140).

Almost surely, 2^18867118018 is an apocalyptic number.

18867118018 is a deficient number, since it is larger than the sum of its proper divisors (13709204222).

18867118018 is a wasteful number, since it uses less digits than its factorization.

18867118018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9695481.

The product of its (nonzero) digits is 172032, while the sum is 49.

The spelling of 18867118018 in words is "eighteen billion, eight hundred sixty-seven million, one hundred eighteen thousand, eighteen".