18685179704 has 8 divisors (see below), whose sum is σ = 35034711960. Its totient is φ = 9342589848.

The previous prime is 18685179647. The next prime is 18685179707. The reversal of 18685179704 is 40797158681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18685179704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18685179707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1167823724 + ... + 1167823739.

It is an arithmetic number, because the mean of its divisors is an integer number (4379338995).

Almost surely, 2^18685179704 is an apocalyptic number.

It is an amenable number.

18685179704 is a deficient number, since it is larger than the sum of its proper divisors (16349532256).

18685179704 is a wasteful number, since it uses less digits than its factorization.

18685179704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335647469 (or 2335647465 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 18685179704 in words is "eighteen billion, six hundred eighty-five million, one hundred seventy-nine thousand, seven hundred four".