204423404 has 24 divisors (see below), whose sum is σ = 361794048. Its totient is φ = 101059920.

The previous prime is 204423403. The next prime is 204423421. The reversal of 204423404 is 404324402.

It is a self number, because there is not a number n which added to its sum of digits gives 204423404.

It is not an unprimeable number, because it can be changed into a prime (204423403) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 191777 + ... + 192839.

It is an arithmetic number, because the mean of its divisors is an integer number (15074752).

Almost surely, 2^204423404 is an apocalyptic number.

It is an amenable number.

204423404 is a deficient number, since it is larger than the sum of its proper divisors (157370644).

204423404 is a wasteful number, since it uses less digits than its factorization.

204423404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 204423404 is about 14297.6712789181. The cubic root of 204423404 is about 589.0835182208.

Adding to 204423404 its reverse (404324402), we get a palindrome (608747806).

The spelling of 204423404 in words is "two hundred four million, four hundred twenty-three thousand, four hundred four".