18973200216 has 16 divisors (see below), whose sum is σ = 47433000600. Its totient is φ = 6324400064.

The previous prime is 18973200203. The next prime is 18973200223. The reversal of 18973200216 is 61200237981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395274981 + ... + 395275028.

Almost surely, 2^18973200216 is an apocalyptic number.

It is an amenable number.

18973200216 is an abundant number, since it is smaller than the sum of its proper divisors (28459800384).

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

18973200216 is a wasteful number, since it uses less digits than its factorization.

18973200216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790550018 (or 790550014 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 18973200216 in words is "eighteen billion, nine hundred seventy-three million, two hundred thousand, two hundred sixteen".