18916656372 has 72 divisors (see below), whose sum is σ = 48355821696. Its totient is φ = 6234637824.

The previous prime is 18916656293. The next prime is 18916656373. The reversal of 18916656372 is 27365661981.

18916656372 is a `hidden beast` number, since 1 + 8 + 9 + 1 + 6 + 6 + 563 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18916656373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5190783 + ... + 5194425.

Almost surely, 2^18916656372 is an apocalyptic number.

18916656372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18916656372 is an abundant number, since it is smaller than the sum of its proper divisors (29439165324).

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

18916656372 is a wasteful number, since it uses less digits than its factorization.

18916656372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5232 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 18916656372 in words is "eighteen billion, nine hundred sixteen million, six hundred fifty-six thousand, three hundred seventy-two".