18239218032728 has 64 divisors (see below), whose sum is σ = 43677063198720. Its totient is φ = 6932867155200.

The previous prime is 18239218032703. The next prime is 18239218032731. The reversal of 18239218032728 is 82723081293281.

It is a Harshad number since it is a multiple of its sum of digits (56).

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 15 ways as a sum of consecutive naturals, for example, 361061576 + ... + 361112087.

It is an arithmetic number, because the mean of its divisors is an integer number (682454112480).

Almost surely, 2^{18239218032728} is an apocalyptic number.

It is an amenable number.

18239218032728 is an abundant number, since it is smaller than the sum of its proper divisors (25437845165992).

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

18239218032728 is a wasteful number, since it uses less digits than its factorization.

18239218032728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722173728 (or 722173724 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 18239218032728 in words is "eighteen trillion, two hundred thirty-nine billion, two hundred eighteen million, thirty-two thousand, seven hundred twenty-eight".