204356 has 12 divisors (see below), whose sum is σ = 365568. Its totient is φ = 99912.

The previous prime is 204353. The next prime is 204359. The reversal of 204356 is 653402.

204356 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (204353) and next prime (204359).

It is a super-2 number, since 2×204356² = 83522749472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356 + ... + 731.

It is an arithmetic number, because the mean of its divisors is an integer number (30464).

2²⁰⁴³⁵⁶ is an apocalyptic number.

It is an amenable number.

204356 is a deficient number, since it is larger than the sum of its proper divisors (161212).

204356 is a wasteful number, since it uses less digits than its factorization.

204356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 204356 is about 452.0575184642. The cubic root of 204356 is about 58.9018765442.

Adding to 204356 its reverse (653402), we get a palindrome (857758).

The spelling of 204356 in words is "two hundred four thousand, three hundred fifty-six".