204206220 has 36 divisors (see below), whose sum is σ = 619426080. Its totient is φ = 54454944.

The previous prime is 204206203. The next prime is 204206251. The reversal of 204206220 is 22602402.

It is a happy number.

204206220 is a `hidden beast` number, since 2 + 0 + 42 + 0 + 622 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204206193 and 204206202.

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 11 ways as a sum of consecutive naturals, for example, 567060 + ... + 567419.

It is an arithmetic number, because the mean of its divisors is an integer number (17206280).

Almost surely, 2^204206220 is an apocalyptic number.

204206220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204206220 is an abundant number, since it is smaller than the sum of its proper divisors (415219860).

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

204206220 is a wasteful number, since it uses less digits than its factorization.

204206220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134494 (or 1134489 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204206220 is about 14290.0741775542. The cubic root of 204206220 is about 588.8748257918.

Adding to 204206220 its reverse (22602402), we get a palindrome (226808622).

The spelling of 204206220 in words is "two hundred four million, two hundred six thousand, two hundred twenty".