18051328 has 36 divisors (see below), whose sum is σ = 36424080. Its totient is φ = 8927744.

The previous prime is 18051317. The next prime is 18051329. The reversal of 18051328 is 82315081.

It is a junction number, because it is equal to n+sod(n) for n = 18051296 and 18051305.

It is not an unprimeable number, because it can be changed into a prime (18051329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27063 + ... + 27721.

It is an arithmetic number, because the mean of its divisors is an integer number (1011780).

Almost surely, 2^18051328 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 18051328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18212040).

18051328 is an abundant number, since it is smaller than the sum of its proper divisors (18372752).

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

18051328 is an equidigital number, since it uses as much as digits as its factorization.

18051328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18051328 is about 4248.6854437579. The cubic root of 18051328 is about 262.3230093379.

The spelling of 18051328 in words is "eighteen million, fifty-one thousand, three hundred twenty-eight".