18381929192 has 32 divisors (see below), whose sum is σ = 38075356800. Its totient is φ = 8249654400.

The previous prime is 18381929149. The next prime is 18381929227. The reversal of 18381929192 is 29192918381.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315109 + ... + 1329012.

It is an arithmetic number, because the mean of its divisors is an integer number (1189854900).

Almost surely, 2^18381929192 is an apocalyptic number.

It is an amenable number.

18381929192 is an abundant number, since it is smaller than the sum of its proper divisors (19693427608).

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

18381929192 is a wasteful number, since it uses less digits than its factorization.

18381929192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644217 (or 2644213 counting only the distinct ones).

The product of its digits is 559872, while the sum is 53.

The spelling of 18381929192 in words is "eighteen billion, three hundred eighty-one million, nine hundred twenty-nine thousand, one hundred ninety-two".