18938195194 has 8 divisors (see below), whose sum is σ = 30078310068. Its totient is φ = 8912091840.

The previous prime is 18938195191. The next prime is 18938195201. The reversal of 18938195194 is 49159183981.

It can be written as a sum of positive squares in 2 ways, for example, as 17692458169 + 1245737025 = 133013^2 + 35295^2 .

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

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, 278502837 + ... + 278502904.

Almost surely, 2^18938195194 is an apocalyptic number.

18938195194 is a deficient number, since it is larger than the sum of its proper divisors (11140114874).

18938195194 is a wasteful number, since it uses less digits than its factorization.

18938195194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557005760.

The product of its digits is 2799360, while the sum is 58.

The spelling of 18938195194 in words is "eighteen billion, nine hundred thirty-eight million, one hundred ninety-five thousand, one hundred ninety-four".