18020328 has 32 divisors (see below), whose sum is σ = 45160800. Its totient is φ = 5992128.

The previous prime is 18020309. The next prime is 18020329. The reversal of 18020328 is 82302081.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 18020298 and 18020307.

It is not an unprimeable number, because it can be changed into a prime (18020329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14250 + ... + 15462.

It is an arithmetic number, because the mean of its divisors is an integer number (1411275).

Almost surely, 2^18020328 is an apocalyptic number.

It is an amenable number.

18020328 is an abundant number, since it is smaller than the sum of its proper divisors (27140472).

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

18020328 is a wasteful number, since it uses less digits than its factorization.

18020328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18020328 is about 4245.0356888959. The cubic root of 18020328 is about 262.1727586594.

The spelling of 18020328 in words is "eighteen million, twenty thousand, three hundred twenty-eight".