18006195872 has 24 divisors (see below), whose sum is σ = 40513941216. Its totient is φ = 7716940992.

The previous prime is 18006195827. The next prime is 18006195913. The reversal of 18006195872 is 27859160081.

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 3 ways as a sum of consecutive naturals, for example, 40192178 + ... + 40192625.

It is an arithmetic number, because the mean of its divisors is an integer number (1688080884).

Almost surely, 2^18006195872 is an apocalyptic number.

It is an amenable number.

18006195872 is an abundant number, since it is smaller than the sum of its proper divisors (22507745344).

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

18006195872 is an equidigital number, since it uses as much as digits as its factorization.

18006195872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80384820 (or 80384812 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 18006195872 in words is "eighteen billion, six million, one hundred ninety-five thousand, eight hundred seventy-two".