204204020 has 24 divisors (see below), whose sum is σ = 451399200. Its totient is φ = 77382432.

The previous prime is 204203981. The next prime is 204204031. The reversal of 204204020 is 20402402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 204203986 and 204204004.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 268310 + ... + 269069.

It is an arithmetic number, because the mean of its divisors is an integer number (18808300).

Almost surely, 2^204204020 is an apocalyptic number.

204204020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204204020 is an abundant number, since it is smaller than the sum of its proper divisors (247195180).

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

204204020 is a wasteful number, since it uses less digits than its factorization.

204204020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537407 (or 537405 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204204020 is about 14289.9972008395. The cubic root of 204204020 is about 588.8727110517.

Adding to 204204020 its reverse (20402402), we get a palindrome (224606422).

The spelling of 204204020 in words is "two hundred four million, two hundred four thousand, twenty".