23405205 has 16 divisors (see below), whose sum is σ = 37814400. Its totient is φ = 12360768.

The previous prime is 23405203. The next prime is 23405257. The reversal of 23405205 is 50250432.

It is not a de Polignac number, because 23405205 - 2¹ = 23405203 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405203) 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 15 ways as a sum of consecutive naturals, for example, 6030 + ... + 9119.

It is an arithmetic number, because the mean of its divisors is an integer number (2363400).

Almost surely, 2^23405205 is an apocalyptic number.

It is an amenable number.

23405205 is a deficient number, since it is larger than the sum of its proper divisors (14409195).

23405205 is a wasteful number, since it uses less digits than its factorization.

23405205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15260.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 23405205 is about 4837.8926197261. The cubic root of 23405205 is about 286.0470564983.

Adding to 23405205 its reverse (50250432), we get a palindrome (73655637).

The spelling of 23405205 in words is "twenty-three million, four hundred five thousand, two hundred five".