18364779894 has 8 divisors (see below), whose sum is σ = 36729559800. Its totient is φ = 6121593296.

The previous prime is 18364779877. The next prime is 18364779913. The reversal of 18364779894 is 49897746381.

It is a sphenic number, since it is the product of 3 distinct primes.

18364779894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530398319 + ... + 1530398330.

It is an arithmetic number, because the mean of its divisors is an integer number (4591194975).

Almost surely, 2^18364779894 is an apocalyptic number.

18364779894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18364779894 is a wasteful number, since it uses less digits than its factorization.

18364779894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060796654.

The product of its digits is 73156608, while the sum is 66.

The spelling of 18364779894 in words is "eighteen billion, three hundred sixty-four million, seven hundred seventy-nine thousand, eight hundred ninety-four".