18216473184 has 384 divisors, whose sum is σ = 66999260160. Its totient is φ = 4686336000.

The previous prime is 18216473159. The next prime is 18216473257. The reversal of 18216473184 is 48137461281.

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 63 ways as a sum of consecutive naturals, for example, 3220759 + ... + 3226409.

It is an arithmetic number, because the mean of its divisors is an integer number (174477240).

Almost surely, 2^18216473184 is an apocalyptic number.

18216473184 is a gapful number since it is divisible by the number (14) 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 18216473184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33499630080).

18216473184 is an abundant number, since it is smaller than the sum of its proper divisors (48782786976).

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

18216473184 is a wasteful number, since it uses less digits than its factorization.

18216473184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5731 (or 5717 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 18216473184 in words is "eighteen billion, two hundred sixteen million, four hundred seventy-three thousand, one hundred eighty-four".