204009020 has 48 divisors (see below), whose sum is σ = 441141120. Its totient is φ = 79215936.

The previous prime is 204009019. The next prime is 204009041. The reversal of 204009020 is 20900402.

204009020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 204009020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96899 + ... + 98981.

It is an arithmetic number, because the mean of its divisors is an integer number (9190440).

Almost surely, 2^204009020 is an apocalyptic number.

204009020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204009020 is an abundant number, since it is smaller than the sum of its proper divisors (237132100).

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

204009020 is a wasteful number, since it uses less digits than its factorization.

204009020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 204009020 is about 14283.1726167543. The cubic root of 204009020 is about 588.6852078061.

Adding to 204009020 its reverse (20900402), we get a palindrome (224909422).

The spelling of 204009020 in words is "two hundred four million, nine thousand, twenty".