18938195196 has 12 divisors (see below), whose sum is σ = 44189122152. Its totient is φ = 6312731728.

The previous prime is 18938195191. The next prime is 18938195201. The reversal of 18938195196 is 69159183981.

It is an interprime number because it is at equal distance from previous prime (18938195191) and next prime (18938195201).

It is a tau number, because it is divible by the number of its divisors (12).

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, 789091455 + ... + 789091478.

It is an arithmetic number, because the mean of its divisors is an integer number (3682426846).

Almost surely, 2^18938195196 is an apocalyptic number.

It is an amenable number.

18938195196 is an abundant number, since it is smaller than the sum of its proper divisors (25250926956).

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

18938195196 is a wasteful number, since it uses less digits than its factorization.

18938195196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578182940 (or 1578182938 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 60.

The spelling of 18938195196 in words is "eighteen billion, nine hundred thirty-eight million, one hundred ninety-five thousand, one hundred ninety-six".