18345717216 has 240 divisors, whose sum is σ = 57193234560. Its totient is φ = 5752684800.

The previous prime is 18345717209. The next prime is 18345717227. The reversal of 18345717216 is 61271754381.

18345717216 is a `hidden beast` number, since 1 + 8 + 3 + 4 + 571 + 72 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7435215 + ... + 7437681.

It is an arithmetic number, because the mean of its divisors is an integer number (238305144).

Almost surely, 2^18345717216 is an apocalyptic number.

18345717216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18345717216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28596617280).

18345717216 is an abundant number, since it is smaller than the sum of its proper divisors (38847517344).

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

18345717216 is a wasteful number, since it uses less digits than its factorization.

18345717216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2642 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The spelling of 18345717216 in words is "eighteen billion, three hundred forty-five million, seven hundred seventeen thousand, two hundred sixteen".