181868118018 has 16 divisors (see below), whose sum is σ = 363926398176. Its totient is φ = 60591012320.

The previous prime is 181868117999. The next prime is 181868118023. The reversal of 181868118018 is 810811868181.

It is an unprimeable number.

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, 7910988 + ... + 7933943.

It is an arithmetic number, because the mean of its divisors is an integer number (22745399886).

Almost surely, 2^181868118018 is an apocalyptic number.

181868118018 is an abundant number, since it is smaller than the sum of its proper divisors (182058280158).

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

181868118018 is a wasteful number, since it uses less digits than its factorization.

181868118018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15846849.

The product of its (nonzero) digits is 196608, while the sum is 51.

The spelling of 181868118018 in words is "one hundred eighty-one billion, eight hundred sixty-eight million, one hundred eighteen thousand, eighteen".