18666685017 has 12 divisors (see below), whose sum is σ = 27536670720. Its totient is φ = 12179680728.

The previous prime is 18666685007. The next prime is 18666685021. The reversal of 18666685017 is 71058666681.

It is not a de Polignac number, because 18666685017 - 2⁴ = 18666685001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18666685007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22064217 + ... + 22065062.

It is an arithmetic number, because the mean of its divisors is an integer number (2294722560).

Almost surely, 2^18666685017 is an apocalyptic number.

It is an amenable number.

18666685017 is a deficient number, since it is larger than the sum of its proper divisors (8869985703).

18666685017 is a wasteful number, since it uses less digits than its factorization.

18666685017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44129332 (or 44129329 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 18666685017 in words is "eighteen billion, six hundred sixty-six million, six hundred eighty-five thousand, seventeen".