18518314608 has 280 divisors, whose sum is σ = 57930171696. Its totient is φ = 5710694400.

The previous prime is 18518314583. The next prime is 18518314663. The reversal of 18518314608 is 80641381581.

18518314608 is a `hidden beast` number, since 1 + 8 + 5 + 1 + 8 + 31 + 4 + 608 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 12094803 + ... + 12096333.

Almost surely, 2^18518314608 is an apocalyptic number.

18518314608 is a gapful number since it is divisible by the number (18) 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 18518314608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28965085848).

18518314608 is an abundant number, since it is smaller than the sum of its proper divisors (39411857088).

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

18518314608 is a wasteful number, since it uses less digits than its factorization.

18518314608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 18518314608 in words is "eighteen billion, five hundred eighteen million, three hundred fourteen thousand, six hundred eight".