18184873868 has 24 divisors (see below), whose sum is σ = 36374736384. Its totient is φ = 7792448400.

The previous prime is 18184873807. The next prime is 18184873933. The reversal of 18184873868 is 86837848181.

It is a self number, because there is not a number n which added to its sum of digits gives 18184873868.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 183773 + ... + 264843.

It is an arithmetic number, because the mean of its divisors is an integer number (1515614016).

Almost surely, 2^18184873868 is an apocalyptic number.

It is an amenable number.

18184873868 is an abundant number, since it is smaller than the sum of its proper divisors (18189862516).

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

18184873868 is a wasteful number, since it uses less digits than its factorization.

18184873868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89093 (or 89091 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 62.

The spelling of 18184873868 in words is "eighteen billion, one hundred eighty-four million, eight hundred seventy-three thousand, eight hundred sixty-eight".