18516900216 has 32 divisors (see below), whose sum is σ = 46337212800. Its totient is φ = 6166305120.

The previous prime is 18516900211. The next prime is 18516900289. The reversal of 18516900216 is 61200961581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18516900211) by changing a digit.

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, 349426 + ... + 398913.

It is an arithmetic number, because the mean of its divisors is an integer number (1448037900).

Almost surely, 2^18516900216 is an apocalyptic number.

It is an amenable number.

18516900216 is an abundant number, since it is smaller than the sum of its proper divisors (27820312584).

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

18516900216 is a wasteful number, since it uses less digits than its factorization.

18516900216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749379 (or 749375 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 18516900216 in words is "eighteen billion, five hundred sixteen million, nine hundred thousand, two hundred sixteen".