20304318 has 32 divisors (see below), whose sum is σ = 42227712. Its totient is φ = 6501600.

The previous prime is 20304313. The next prime is 20304413. The reversal of 20304318 is 81340302.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20304294 and 20304303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31863 + ... + 32493.

It is an arithmetic number, because the mean of its divisors is an integer number (1319616).

Almost surely, 2^20304318 is an apocalyptic number.

20304318 is an abundant number, since it is smaller than the sum of its proper divisors (21923394).

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

20304318 is a wasteful number, since it uses less digits than its factorization.

20304318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20304318 is about 4506.0312915025. The cubic root of 20304318 is about 272.8115808644.

The spelling of 20304318 in words is "twenty million, three hundred four thousand, three hundred eighteen".