20304264 has 32 divisors (see below), whose sum is σ = 51408000. Its totient is φ = 6681792.

The previous prime is 20304259. The next prime is 20304281. The reversal of 20304264 is 46240302.

It is a self number, because there is not a number n which added to its sum of digits gives 20304264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3459 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (1606500).

Almost surely, 2^20304264 is an apocalyptic number.

20304264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20304264 is an abundant number, since it is smaller than the sum of its proper divisors (31103736).

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

20304264 is a wasteful number, since it uses less digits than its factorization.

20304264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10797 (or 10793 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20304264 is about 4506.0252995295. The cubic root of 20304264 is about 272.8113390138.

Adding to 20304264 its reverse (46240302), we get a palindrome (66544566).

The spelling of 20304264 in words is "twenty million, three hundred four thousand, two hundred sixty-four".