23040905 has 16 divisors (see below), whose sum is σ = 29213184. Its totient is φ = 17418240.

The previous prime is 23040889. The next prime is 23040929. The reversal of 23040905 is 50904032.

It is not a de Polignac number, because 23040905 - 2⁴ = 23040889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4937 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (1825824).

Almost surely, 2^23040905 is an apocalyptic number.

It is an amenable number.

23040905 is a deficient number, since it is larger than the sum of its proper divisors (6172279).

23040905 is a wasteful number, since it uses less digits than its factorization.

23040905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 23040905 is about 4800.0942699076. The cubic root of 23040905 is about 284.5551899915. Note that the first 3 decimals are identical.

Adding to 23040905 its reverse (50904032), we get a palindrome (73944937).

The spelling of 23040905 in words is "twenty-three million, forty thousand, nine hundred five".