204423020 has 12 divisors (see below), whose sum is σ = 429288384. Its totient is φ = 81769200.

The previous prime is 204423013. The next prime is 204423031. The reversal of 204423020 is 20324402.

It is a super-2 number, since 2×204423020² = 83577542211840800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204423020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110556 + ... + 5110595.

It is an arithmetic number, because the mean of its divisors is an integer number (35774032).

Almost surely, 2^204423020 is an apocalyptic number.

204423020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204423020 is an abundant number, since it is smaller than the sum of its proper divisors (224865364).

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

204423020 is a wasteful number, since it uses less digits than its factorization.

204423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10221160 (or 10221158 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 204423020 is about 14297.6578501515. The cubic root of 204423020 is about 589.0831493651.

Adding to 204423020 its reverse (20324402), we get a palindrome (224747422).

The spelling of 204423020 in words is "two hundred four million, four hundred twenty-three thousand, twenty".