204023 has 2 divisors, whose sum is σ = 204024. Its totient is φ = 204022.

The previous prime is 204019. The next prime is 204047. The reversal of 204023 is 320402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204023 - 2² = 204019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203995 and 204013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102011 + 102012.

It is an arithmetic number, because the mean of its divisors is an integer number (102012).

2²⁰⁴⁰²³ is an apocalyptic number.

204023 is a deficient number, since it is larger than the sum of its proper divisors (1).

204023 is an equidigital number, since it uses as much as digits as its factorization.

204023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 204023 is about 451.6890523358. The cubic root of 204023 is about 58.8698654321.

Adding to 204023 its reverse (320402), we get a palindrome (524425).

The spelling of 204023 in words is "two hundred four thousand, twenty-three", and thus it is an iban number.