23109905 has 24 divisors (see below), whose sum is σ = 34327872. Its totient is φ = 14624064.

The previous prime is 23109893. The next prime is 23109913. The reversal of 23109905 is 50990132.

It is not a de Polignac number, because 23109905 - 2⁸ = 23109649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3962 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (1430328).

Almost surely, 2^23109905 is an apocalyptic number.

It is an amenable number.

23109905 is a deficient number, since it is larger than the sum of its proper divisors (11217967).

23109905 is a wasteful number, since it uses less digits than its factorization.

23109905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 23109905 is about 4807.2762558438. The cubic root of 23109905 is about 284.8389569298.

The spelling of 23109905 in words is "twenty-three million, one hundred nine thousand, nine hundred five".