18187922212 has 12 divisors (see below), whose sum is σ = 32368336560. Its totient is φ = 8939826056.

The previous prime is 18187922201. The next prime is 18187922261. The reversal of 18187922212 is 21222978181.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38533498 + ... + 38533969.

It is an arithmetic number, because the mean of its divisors is an integer number (2697361380).

Almost surely, 2^18187922212 is an apocalyptic number.

It is an amenable number.

18187922212 is a deficient number, since it is larger than the sum of its proper divisors (14180414348).

18187922212 is a wasteful number, since it uses less digits than its factorization.

18187922212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77067530 (or 77067528 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The spelling of 18187922212 in words is "eighteen billion, one hundred eighty-seven million, nine hundred twenty-two thousand, two hundred twelve".