23306405 has 18 divisors (see below), whose sum is σ = 29945394. Its totient is φ = 17410176.

The previous prime is 23306377. The next prime is 23306417. The reversal of 23306405 is 50460332.

It can be written as a sum of positive squares in 3 ways, for example, as 7806436 + 15499969 = 2794^2 + 3937^2 .

It is not a de Polignac number, because 23306405 - 2⁸ = 23306149 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 183452 + ... + 183578.

It is an arithmetic number, because the mean of its divisors is an integer number (1663633).

Almost surely, 2^23306405 is an apocalyptic number.

It is an amenable number.

23306405 is a deficient number, since it is larger than the sum of its proper divisors (6638989).

23306405 is an equidigital number, since it uses as much as digits as its factorization.

23306405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 23306405 is about 4827.6707634220. The cubic root of 23306405 is about 285.6439936008.

Adding to 23306405 its reverse (50460332), we get a palindrome (73766737).

The spelling of 23306405 in words is "twenty-three million, three hundred six thousand, four hundred five".