20224904 has 16 divisors (see below), whose sum is σ = 43339200. Its totient is φ = 8667792.

The previous prime is 20224901. The next prime is 20224909. The reversal of 20224904 is 40942202.

It is a self number, because there is not a number n which added to its sum of digits gives 20224904.

It is not an unprimeable number, because it can be changed into a prime (20224901) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 180524 + ... + 180635.

It is an arithmetic number, because the mean of its divisors is an integer number (2708700).

Almost surely, 2^20224904 is an apocalyptic number.

It is an amenable number.

20224904 is an abundant number, since it is smaller than the sum of its proper divisors (23114296).

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

20224904 is a wasteful number, since it uses less digits than its factorization.

20224904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361172 (or 361168 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20224904 is about 4497.2106910840. The cubic root of 20224904 is about 272.4554437152.

The spelling of 20224904 in words is "twenty million, two hundred twenty-four thousand, nine hundred four".