204123423 has 8 divisors (see below), whose sum is σ = 311045248. Its totient is φ = 116641944.

The previous prime is 204123401. The next prime is 204123427. The reversal of 204123423 is 324321402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204123423 - 2⁹ = 204122911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 9720163 = 204123423 / (2 + 0 + 4 + 1 + 2 + 3 + 4 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204123423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204123427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4860061 + ... + 4860102.

It is an arithmetic number, because the mean of its divisors is an integer number (38880656).

Almost surely, 2^204123423 is an apocalyptic number.

204123423 is a deficient number, since it is larger than the sum of its proper divisors (106921825).

204123423 is an equidigital number, since it uses as much as digits as its factorization.

204123423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720173.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 204123423 is about 14287.1768729865. The cubic root of 204123423 is about 588.7952270736.

Adding to 204123423 its reverse (324321402), we get a palindrome (528444825).

The spelling of 204123423 in words is "two hundred four million, one hundred twenty-three thousand, four hundred twenty-three".