18512077824 has 176 divisors, whose sum is σ = 55229697600. Its totient is φ = 6125027328.

The previous prime is 18512077807. The next prime is 18512077921. The reversal of 18512077824 is 42877021581.

It is a self number, because there is not a number n which added to its sum of digits gives 18512077824.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3840664 + ... + 3845480.

It is an arithmetic number, because the mean of its divisors is an integer number (313805100).

Almost surely, 2^18512077824 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 18512077824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27614848800).

18512077824 is an abundant number, since it is smaller than the sum of its proper divisors (36717619776).

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

18512077824 is a wasteful number, since it uses less digits than its factorization.

18512077824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985 (or 4961 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 18512077824 in words is "eighteen billion, five hundred twelve million, seventy-seven thousand, eight hundred twenty-four".