204343220 has 12 divisors (see below), whose sum is σ = 429120804. Its totient is φ = 81737280.

The previous prime is 204343187. The next prime is 204343241. The reversal of 204343220 is 22343402.

It can be written as a sum of positive squares in 2 ways, for example, as 86229796 + 118113424 = 9286^2 + 10868^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10217161 = 204343220 / (2 + 0 + 4 + 3 + 4 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 204343192 and 204343201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5108561 + ... + 5108600.

It is an arithmetic number, because the mean of its divisors is an integer number (35760067).

Almost surely, 2^204343220 is an apocalyptic number.

204343220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204343220 is an abundant number, since it is smaller than the sum of its proper divisors (224777584).

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

204343220 is a wasteful number, since it uses less digits than its factorization.

204343220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217170 (or 10217168 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 204343220 is about 14294.8669108880. The cubic root of 204343220 is about 589.0064865158.

Adding to 204343220 its reverse (22343402), we get a palindrome (226686622).

The spelling of 204343220 in words is "two hundred four million, three hundred forty-three thousand, two hundred twenty".