18179795868 has 48 divisors (see below), whose sum is σ = 47156207616. Its totient is φ = 5413337280.

The previous prime is 18179795867. The next prime is 18179795891. The reversal of 18179795868 is 86859797181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18179795863) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1874796 + ... + 1884467.

It is an arithmetic number, because the mean of its divisors is an integer number (982420992).

Almost surely, 2^18179795868 is an apocalyptic number.

It is an amenable number.

18179795868 is an abundant number, since it is smaller than the sum of its proper divisors (28976411748).

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

18179795868 is a wasteful number, since it uses less digits than its factorization.

18179795868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759314 (or 3759312 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 69.

The spelling of 18179795868 in words is "eighteen billion, one hundred seventy-nine million, seven hundred ninety-five thousand, eight hundred sixty-eight".