18478516531392 has 168 divisors, whose sum is σ = 54726974794752. Its totient is φ = 5955024268800.

The previous prime is 18478516531301. The next prime is 18478516531417. The reversal of 18478516531392 is 29313561587481.

18478516531392 is a `hidden beast` number, since 1 + 8 + 4 + 7 + 8 + 5 + 1 + 6 + 531 + 3 + 92 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17907663 + ... + 18911409.

Almost surely, 2^{18478516531392} is an apocalyptic number.

18478516531392 is a gapful number since it is divisible by the number (12) 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 18478516531392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27363487397376).

18478516531392 is an abundant number, since it is smaller than the sum of its proper divisors (36248458263360).

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

18478516531392 is a wasteful number, since it uses less digits than its factorization.

18478516531392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004827 (or 1004814 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 18478516531392 in words is "eighteen trillion, four hundred seventy-eight billion, five hundred sixteen million, five hundred thirty-one thousand, three hundred ninety-two".