18920328 has 32 divisors (see below), whose sum is σ = 54058560. Its totient is φ = 5405760.

The previous prime is 18920327. The next prime is 18920347. The reversal of 18920328 is 82302981.

It is not an unprimeable number, because it can be changed into a prime (18920327) 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, 56143 + ... + 56478.

It is an arithmetic number, because the mean of its divisors is an integer number (1689330).

Almost surely, 2^18920328 is an apocalyptic number.

It is an amenable number.

18920328 is an abundant number, since it is smaller than the sum of its proper divisors (35138232).

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

18920328 is a wasteful number, since it uses less digits than its factorization.

18920328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112637 (or 112633 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18920328 is about 4349.7503376631. The cubic root of 18920328 is about 266.4666653132.

The spelling of 18920328 in words is "eighteen million, nine hundred twenty thousand, three hundred twenty-eight".