18534023178 has 16 divisors (see below), whose sum is σ = 40437868896. Its totient is φ = 5616370640.

The previous prime is 18534023159. The next prime is 18534023197. The reversal of 18534023178 is 87132043581.

It is an interprime number because it is at equal distance from previous prime (18534023159) and next prime (18534023197).

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, 140409201 + ... + 140409332.

It is an arithmetic number, because the mean of its divisors is an integer number (2527366806).

Almost surely, 2^18534023178 is an apocalyptic number.

18534023178 is an abundant number, since it is smaller than the sum of its proper divisors (21903845718).

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

18534023178 is a wasteful number, since it uses less digits than its factorization.

18534023178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280818549.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 18534023178 in words is "eighteen billion, five hundred thirty-four million, twenty-three thousand, one hundred seventy-eight".