18938195212 has 6 divisors (see below), whose sum is σ = 33141841628. Its totient is φ = 9469097604.

The previous prime is 18938195201. The next prime is 18938195231. The reversal of 18938195212 is 21259183981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2367274398 + ... + 2367274405.

Almost surely, 2^18938195212 is an apocalyptic number.

It is an amenable number.

18938195212 is a deficient number, since it is larger than the sum of its proper divisors (14203646416).

18938195212 is a wasteful number, since it uses less digits than its factorization.

18938195212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734548807 (or 4734548805 counting only the distinct ones).

The product of its digits is 311040, while the sum is 49.

The spelling of 18938195212 in words is "eighteen billion, nine hundred thirty-eight million, one hundred ninety-five thousand, two hundred twelve".