204430423 has 4 divisors (see below), whose sum is σ = 216455760. Its totient is φ = 192405088.

The previous prime is 204430409. The next prime is 204430451. The reversal of 204430423 is 324034402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324034402 = 2 ⋅162017201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204430423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204430394 and 204430403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204430453) 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, 6012643 + ... + 6012676.

It is an arithmetic number, because the mean of its divisors is an integer number (54113940).

Almost surely, 2^204430423 is an apocalyptic number.

204430423 is a deficient number, since it is larger than the sum of its proper divisors (12025337).

204430423 is a wasteful number, since it uses less digits than its factorization.

204430423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12025336.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 204430423 is about 14297.9167363641. The cubic root of 204430423 is about 589.0902603221.

Adding to 204430423 its reverse (324034402), we get a palindrome (528464825).

The spelling of 204430423 in words is "two hundred four million, four hundred thirty thousand, four hundred twenty-three".