18521828183504 has 20 divisors (see below), whose sum is σ = 37996985759364. Its totient is φ = 8716154439168.

The previous prime is 18521828183501. The next prime is 18521828183513. The reversal of 18521828183504 is 40538182812581.

It can be written as a sum of positive squares in 2 ways, for example, as 17333466569104 + 1188361614400 = 4163348^2 + 1090120^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18521828183504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18521828183501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34047478007 + ... + 34047478550.

Almost surely, 2^{18521828183504} is an apocalyptic number.

It is an amenable number.

18521828183504 is an abundant number, since it is smaller than the sum of its proper divisors (19475157575860).

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

18521828183504 is a wasteful number, since it uses less digits than its factorization.

18521828183504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68094956582 (or 68094956576 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 56.

The spelling of 18521828183504 in words is "eighteen trillion, five hundred twenty-one billion, eight hundred twenty-eight million, one hundred eighty-three thousand, five hundred four".