18195318292 has 24 divisors (see below), whose sum is σ = 31981898144. Its totient is φ = 9057720672.

The previous prime is 18195318259. The next prime is 18195318293. The reversal of 18195318292 is 29281359181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195318293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858163 + ... + 879109.

Almost surely, 2^18195318292 is an apocalyptic number.

It is an amenable number.

18195318292 is a deficient number, since it is larger than the sum of its proper divisors (13786579852).

18195318292 is a wasteful number, since it uses less digits than its factorization.

18195318292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21895 (or 21893 counting only the distinct ones).

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

The spelling of 18195318292 in words is "eighteen billion, one hundred ninety-five million, three hundred eighteen thousand, two hundred ninety-two".