18181818186 has 24 divisors (see below), whose sum is σ = 42300557280. Its totient is φ = 5194805112.

The previous prime is 18181818119. The next prime is 18181818209. The reversal of 18181818186 is 68181818181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30921166 + ... + 30921753.

It is an arithmetic number, because the mean of its divisors is an integer number (1762523220).

Almost surely, 2^18181818186 is an apocalyptic number.

18181818186 is an abundant number, since it is smaller than the sum of its proper divisors (24118739094).

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

18181818186 is a wasteful number, since it uses less digits than its factorization.

18181818186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61842938 (or 61842931 counting only the distinct ones).

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

The spelling of 18181818186 in words is "eighteen billion, one hundred eighty-one million, eight hundred eighteen thousand, one hundred eighty-six".