204124220 has 24 divisors (see below), whose sum is σ = 451222800. Its totient is φ = 77352192.

The previous prime is 204124213. The next prime is 204124223. The reversal of 204124220 is 22421402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204124223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268205 + ... + 268964.

It is an arithmetic number, because the mean of its divisors is an integer number (18800950).

Almost surely, 2^204124220 is an apocalyptic number.

204124220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204124220 is an abundant number, since it is smaller than the sum of its proper divisors (247098580).

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

204124220 is a wasteful number, since it uses less digits than its factorization.

204124220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537197 (or 537195 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 204124220 is about 14287.2047651036. The cubic root of 204124220 is about 588.7959933897.

Adding to 204124220 its reverse (22421402), we get a palindrome (226545622).

The spelling of 204124220 in words is "two hundred four million, one hundred twenty-four thousand, two hundred twenty".