204204220 has 48 divisors (see below), whose sum is σ = 468873216. Its totient is φ = 74088000.

The previous prime is 204204211. The next prime is 204204227. The reversal of 204204220 is 22402402.

It is a junction number, because it is equal to n+sod(n) for n = 204204194 and 204204203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204204227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138085 + ... + 139555.

It is an arithmetic number, because the mean of its divisors is an integer number (9768192).

Almost surely, 2^204204220 is an apocalyptic number.

204204220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204204220 is an abundant number, since it is smaller than the sum of its proper divisors (264668996).

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

204204220 is a wasteful number, since it uses less digits than its factorization.

204204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2120 counting only the distinct ones).

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

The square root of 204204220 is about 14290.0041987398. The cubic root of 204204220 is about 588.8729033014.

Adding to 204204220 its reverse (22402402), we get a palindrome (226606622).

The spelling of 204204220 in words is "two hundred four million, two hundred four thousand, two hundred twenty".