23205005 has 4 divisors (see below), whose sum is σ = 27846012. Its totient is φ = 18564000.

The previous prime is 23204971. The next prime is 23205011. The reversal of 23205005 is 50050232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5924356 + 17280649 = 2434^2 + 4157^2 .

It is not a de Polignac number, because 23205005 - 2⁶ = 23204941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320496 + ... + 2320505.

It is an arithmetic number, because the mean of its divisors is an integer number (6961503).

Almost surely, 2^23205005 is an apocalyptic number.

It is an amenable number.

23205005 is a deficient number, since it is larger than the sum of its proper divisors (4641007).

23205005 is an equidigital number, since it uses as much as digits as its factorization.

23205005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641006.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 23205005 is about 4817.1573567821. The cubic root of 23205005 is about 285.2291375686.

Adding to 23205005 its reverse (50050232), we get a palindrome (73255237).

The spelling of 23205005 in words is "twenty-three million, two hundred five thousand, five".