23204563 has 4 divisors (see below), whose sum is σ = 23744248. Its totient is φ = 22664880.

The previous prime is 23204557. The next prime is 23204593. The reversal of 23204563 is 36540232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23204563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23204593) by changing a digit.

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, 269778 + ... + 269863.

It is an arithmetic number, because the mean of its divisors is an integer number (5936062).

Almost surely, 2^23204563 is an apocalyptic number.

23204563 is a deficient number, since it is larger than the sum of its proper divisors (539685).

23204563 is an equidigital number, since it uses as much as digits as its factorization.

23204563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539684.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 23204563 is about 4817.1114788844. Note that the first 3 decimals coincide. The cubic root of 23204563 is about 285.2273265788.

Adding to 23204563 its reverse (36540232), we get a palindrome (59744795).

The spelling of 23204563 in words is "twenty-three million, two hundred four thousand, five hundred sixty-three".