18487238616 has 576 divisors, whose sum is σ = 66651586560. Its totient is φ = 4610390400.

The previous prime is 18487238603. The next prime is 18487238729. The reversal of 18487238616 is 61683278481.

18487238616 is a `hidden beast` number, since 18 + 4 + 8 + 7 + 2 + 3 + 8 + 616 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 145568745 + ... + 145568871.

It is an arithmetic number, because the mean of its divisors is an integer number (115714560).

Almost surely, 2^18487238616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18487238616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33325793280).

18487238616 is an abundant number, since it is smaller than the sum of its proper divisors (48164347944).

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

18487238616 is a wasteful number, since it uses less digits than its factorization.

18487238616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 181 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 18487238616 in words is "eighteen billion, four hundred eighty-seven million, two hundred thirty-eight thousand, six hundred sixteen".