18700189838 has 16 divisors (see below), whose sum is σ = 30604964400. Its totient is φ = 8498793600.

The previous prime is 18700189819. The next prime is 18700189843. The reversal of 18700189838 is 83898100781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18700189838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91718 + ... + 214038.

It is an arithmetic number, because the mean of its divisors is an integer number (1912810275).

Almost surely, 2^18700189838 is an apocalyptic number.

18700189838 is a deficient number, since it is larger than the sum of its proper divisors (11904774562).

18700189838 is a wasteful number, since it uses less digits than its factorization.

18700189838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129283.

The product of its (nonzero) digits is 774144, while the sum is 53.

The spelling of 18700189838 in words is "eighteen billion, seven hundred million, one hundred eighty-nine thousand, eight hundred thirty-eight".