18438930216 has 48 divisors (see below), whose sum is σ = 57072880800. Its totient is φ = 5268265632.

The previous prime is 18438930203. The next prime is 18438930311. The reversal of 18438930216 is 61203983481.

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, 18292086 + ... + 18293093.

It is an arithmetic number, because the mean of its divisors is an integer number (1189018350).

Almost surely, 2^18438930216 is an apocalyptic number.

It is an amenable number.

18438930216 is an abundant number, since it is smaller than the sum of its proper divisors (38633950584).

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

18438930216 is a wasteful number, since it uses less digits than its factorization.

18438930216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36585198 (or 36585191 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 18438930216 in words is "eighteen billion, four hundred thirty-eight million, nine hundred thirty thousand, two hundred sixteen".