23319905 has 16 divisors (see below), whose sum is σ = 33014784. Its totient is φ = 15474240.

The previous prime is 23319899. The next prime is 23319913. The reversal of 23319905 is 50991332.

It is not a de Polignac number, because 23319905 - 2⁸ = 23319649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9662 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (2063424).

Almost surely, 2^23319905 is an apocalyptic number.

It is an amenable number.

23319905 is a deficient number, since it is larger than the sum of its proper divisors (9694879).

23319905 is a wasteful number, since it uses less digits than its factorization.

23319905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21536.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 23319905 is about 4829.0687508049. The cubic root of 23319905 is about 285.6991350895.

The spelling of 23319905 in words is "twenty-three million, three hundred nineteen thousand, nine hundred five".