204453 has 6 divisors (see below), whose sum is σ = 295334. Its totient is φ = 136296.

The previous prime is 204443. The next prime is 204461. The reversal of 204453 is 354402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 161604 + 42849 = 402^2 + 207^2 .

It is not a de Polignac number, because 204453 - 2⁴ = 204437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 204453.

It is not an unprimeable number, because it can be changed into a prime (204443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11350 + ... + 11367.

2²⁰⁴⁴⁵³ is an apocalyptic number.

It is an amenable number.

204453 is a deficient number, since it is larger than the sum of its proper divisors (90881).

204453 is a wasteful number, since it uses less digits than its factorization.

204453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22723 (or 22720 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 204453 is about 452.1647929682. The cubic root of 204453 is about 58.9111945616.

Adding to 204453 its reverse (354402), we get a palindrome (558855).

The spelling of 204453 in words is "two hundred four thousand, four hundred fifty-three".