18685368666835 has 32 divisors (see below), whose sum is σ = 24509933908992. Its totient is φ = 13591214017920.

The previous prime is 18685368666773. The next prime is 18685368666857. The reversal of 18685368666835 is 53866686358681.

It is not a de Polignac number, because 18685368666835 - 2¹⁵ = 18685368634067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47915490 + ... + 48303880.

It is an arithmetic number, because the mean of its divisors is an integer number (765935434656).

Almost surely, 2^{18685368666835} is an apocalyptic number.

18685368666835 is a deficient number, since it is larger than the sum of its proper divisors (5824565242157).

18685368666835 is a wasteful number, since it uses less digits than its factorization.

18685368666835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399523.

The product of its digits is 7166361600, while the sum is 79.

The spelling of 18685368666835 in words is "eighteen trillion, six hundred eighty-five billion, three hundred sixty-eight million, six hundred sixty-six thousand, eight hundred thirty-five".