204536 has 16 divisors (see below), whose sum is σ = 394440. Its totient is φ = 99360.

The previous prime is 204521. The next prime is 204557. The reversal of 204536 is 635402.

It is a d-powerful number, because it can be written as 2¹⁷ + 0 + 5³ + 4⁸ + 3³ + 6⁵ .

It is a congruent number.

It is an unprimeable number.

204536 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50 + ... + 641.

2²⁰⁴⁵³⁶ is an apocalyptic number.

It is an amenable number.

204536 is a deficient number, since it is larger than the sum of its proper divisors (189904).

204536 is a wasteful number, since it uses less digits than its factorization.

204536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 730 counting only the distinct ones).

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

The square root of 204536 is about 452.2565643526. The cubic root of 204536 is about 58.9191653709.

Adding to 204536 its reverse (635402), we get a palindrome (839938).

The spelling of 204536 in words is "two hundred four thousand, five hundred thirty-six".