18938195198 has 8 divisors (see below), whose sum is σ = 30592469208. Its totient is φ = 8740705464.

The previous prime is 18938195191. The next prime is 18938195201. The reversal of 18938195198 is 89159183981.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18938195198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18938195191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364196036 + ... + 364196087.

It is an arithmetic number, because the mean of its divisors is an integer number (3824058651).

Almost surely, 2^18938195198 is an apocalyptic number.

18938195198 is a deficient number, since it is larger than the sum of its proper divisors (11654274010).

18938195198 is a wasteful number, since it uses less digits than its factorization.

18938195198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728392138.

The product of its digits is 5598720, while the sum is 62.

The spelling of 18938195198 in words is "eighteen billion, nine hundred thirty-eight million, one hundred ninety-five thousand, one hundred ninety-eight".