18935577166 has 16 divisors (see below), whose sum is σ = 31333644720. Its totient is φ = 8510370880.

The previous prime is 18935577163. The next prime is 18935577179. The reversal of 18935577166 is 66177553981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18935577166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18935577161) 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, 4833481 + ... + 4837396.

It is an arithmetic number, because the mean of its divisors is an integer number (1958352795).

Almost surely, 2^18935577166 is an apocalyptic number.

18935577166 is a deficient number, since it is larger than the sum of its proper divisors (12398067554).

18935577166 is a wasteful number, since it uses less digits than its factorization.

18935577166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9670979.

The product of its digits is 9525600, while the sum is 58.

The spelling of 18935577166 in words is "eighteen billion, nine hundred thirty-five million, five hundred seventy-seven thousand, one hundred sixty-six".