20328384 has 56 divisors (see below), whose sum is σ = 54132480. Its totient is φ = 6732544.

The previous prime is 20328367. The next prime is 20328419. The reversal of 20328384 is 48382302.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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, 45667 + ... + 46109.

Almost surely, 2^20328384 is an apocalyptic number.

20328384 is a gapful number since it is divisible by the number (24) 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 20328384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27066240).

20328384 is an abundant number, since it is smaller than the sum of its proper divisors (33804096).

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

20328384 is a wasteful number, since it uses less digits than its factorization.

20328384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20328384 is about 4508.7009215516. The cubic root of 20328384 is about 272.9193229921.

The spelling of 20328384 in words is "twenty million, three hundred twenty-eight thousand, three hundred eighty-four".