18285193728 has 120 divisors (see below), whose sum is σ = 52832564928. Its totient is φ = 6088108032.

The previous prime is 18285193711. The next prime is 18285193733. The reversal of 18285193728 is 82739158281.

18285193728 is a `hidden beast` number, since 182 + 85 + 19 + 372 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5468025 + ... + 5471367.

Almost surely, 2^18285193728 is an apocalyptic number.

18285193728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18285193728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26416282464).

18285193728 is an abundant number, since it is smaller than the sum of its proper divisors (34547371200).

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

18285193728 is a wasteful number, since it uses less digits than its factorization.

18285193728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554 (or 4535 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 18285193728 in words is "eighteen billion, two hundred eighty-five million, one hundred ninety-three thousand, seven hundred twenty-eight".