18504338928 has 80 divisors (see below), whose sum is σ = 48327502080. Its totient is φ = 6100572672.

The previous prime is 18504338927. The next prime is 18504338939. The reversal of 18504338928 is 82983340581.

It is a super-3 number, since 3×18504338928³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18504338927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5036100 + ... + 5039772.

It is an arithmetic number, because the mean of its divisors is an integer number (604093776).

Almost surely, 2^18504338928 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 18504338928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24163751040).

18504338928 is an abundant number, since it is smaller than the sum of its proper divisors (29823163152).

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

18504338928 is a wasteful number, since it uses less digits than its factorization.

18504338928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806 (or 4800 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 18504338928 in words is "eighteen billion, five hundred four million, three hundred thirty-eight thousand, nine hundred twenty-eight".