18910998216 has 96 divisors (see below), whose sum is σ = 56546773920. Its totient is φ = 5661542400.

The previous prime is 18910998181. The next prime is 18910998259. The reversal of 18910998216 is 61289901981.

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 23 ways as a sum of consecutive naturals, for example, 78105 + ... + 209576.

It is an arithmetic number, because the mean of its divisors is an integer number (589028895).

Almost surely, 2^18910998216 is an apocalyptic number.

It is an amenable number.

18910998216 is an abundant number, since it is smaller than the sum of its proper divisors (37635775704).

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

18910998216 is a wasteful number, since it uses less digits than its factorization.

18910998216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287787 (or 287780 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 54.

The spelling of 18910998216 in words is "eighteen billion, nine hundred ten million, nine hundred ninety-eight thousand, two hundred sixteen".