18685179695 has 32 divisors (see below), whose sum is σ = 27985305600. Its totient is φ = 11660503680.

The previous prime is 18685179647. The next prime is 18685179707. The reversal of 18685179695 is 59697158681.

It is not a de Polignac number, because 18685179695 - 2¹⁴ = 18685163311 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent 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, 256895 + ... + 321504.

It is an arithmetic number, because the mean of its divisors is an integer number (874540800).

Almost surely, 2^18685179695 is an apocalyptic number.

18685179695 is a deficient number, since it is larger than the sum of its proper divisors (9300125905).

18685179695 is a wasteful number, since it uses less digits than its factorization.

18685179695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578495.

The product of its digits is 32659200, while the sum is 65.

The spelling of 18685179695 in words is "eighteen billion, six hundred eighty-five million, one hundred seventy-nine thousand, six hundred ninety-five".