18938195199 has 40 divisors (see below), whose sum is σ = 35271147648. Its totient is φ = 9838020240.

The previous prime is 18938195191. The next prime is 18938195201. The reversal of 18938195199 is 99159183981.

18938195199 is a `hidden beast` number, since 1 + 89 + 38 + 1 + 9 + 519 + 9 = 666.

It is not a de Polignac number, because 18938195199 - 2³ = 18938195191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 39 ways as a sum of consecutive naturals, for example, 1511977 + ... + 1524450.

Almost surely, 2^18938195199 is an apocalyptic number.

18938195199 is a deficient number, since it is larger than the sum of its proper divisors (16332952449).

18938195199 is a wasteful number, since it uses less digits than its factorization.

18938195199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036457 (or 3036448 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 63.

The spelling of 18938195199 in words is "eighteen billion, nine hundred thirty-eight million, one hundred ninety-five thousand, one hundred ninety-nine".