20304308 has 12 divisors (see below), whose sum is σ = 37077600. Its totient is φ = 9710712.

The previous prime is 20304289. The next prime is 20304311. The reversal of 20304308 is 80340302.

It is a self number, because there is not a number n which added to its sum of digits gives 20304308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110258 + ... + 110441.

It is an arithmetic number, because the mean of its divisors is an integer number (3089800).

Almost surely, 2^20304308 is an apocalyptic number.

It is an amenable number.

20304308 is a deficient number, since it is larger than the sum of its proper divisors (16773292).

20304308 is a wasteful number, since it uses less digits than its factorization.

20304308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220726 (or 220724 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20304308 is about 4506.0301818785. The cubic root of 20304308 is about 272.8115360773.

The spelling of 20304308 in words is "twenty million, three hundred four thousand, three hundred eight".