20204224 has 14 divisors (see below), whose sum is σ = 40092884. Its totient is φ = 10102080.

The previous prime is 20204221. The next prime is 20204231. The reversal of 20204224 is 42240202.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20204198 and 20204207.

It is not an unprimeable number, because it can be changed into a prime (20204221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157782 + ... + 157909.

It is a self-describing number.

Almost surely, 2^20204224 is an apocalyptic number.

It is an amenable number.

20204224 is a deficient number, since it is larger than the sum of its proper divisors (19888660).

20204224 is an equidigital number, since it uses as much as digits as its factorization.

20204224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315703 (or 315693 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20204224 is about 4494.9109001180. The cubic root of 20204224 is about 272.3625499895.

Adding to 20204224 its reverse (42240202), we get a palindrome (62444426).

The spelling of 20204224 in words is "twenty million, two hundred four thousand, two hundred twenty-four".