20320304 has 20 divisors (see below), whose sum is σ = 41687064. Its totient is φ = 9562368.

The previous prime is 20320303. The next prime is 20320343. The reversal of 20320304 is 40302302.

It is not an unprimeable number, because it can be changed into a prime (20320303) 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, 37082 + ... + 37625.

Almost surely, 2^20320304 is an apocalyptic number.

It is an amenable number.

20320304 is an abundant number, since it is smaller than the sum of its proper divisors (21366760).

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

20320304 is a wasteful number, since it uses less digits than its factorization.

20320304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74732 (or 74726 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20320304 is about 4507.8047872551. The cubic root of 20320304 is about 272.8831587736.

Adding to 20320304 its reverse (40302302), we get a palindrome (60622606).

The spelling of 20320304 in words is "twenty million, three hundred twenty thousand, three hundred four".