18932553728 has 96 divisors (see below), whose sum is σ = 41393177280. Its totient is φ = 8585748480.

The previous prime is 18932553697. The next prime is 18932553737. The reversal of 18932553728 is 82735523981.

It is a self number, because there is not a number n which added to its sum of digits gives 18932553728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14484851 + ... + 14486157.

It is an arithmetic number, because the mean of its divisors is an integer number (431178930).

Almost surely, 2^18932553728 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 18932553728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20696588640).

18932553728 is an abundant number, since it is smaller than the sum of its proper divisors (22460623552).

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

18932553728 is a wasteful number, since it uses less digits than its factorization.

18932553728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1963 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 53.

The spelling of 18932553728 in words is "eighteen billion, nine hundred thirty-two million, five hundred fifty-three thousand, seven hundred twenty-eight".