23540909 has 16 divisors (see below), whose sum is σ = 27739008. Its totient is φ = 19559232.

The previous prime is 23540899. The next prime is 23540921. The reversal of 23540909 is 90904532.

It is not a de Polignac number, because 23540909 - 2⁸ = 23540653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23540939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59099 + ... + 59495.

It is an arithmetic number, because the mean of its divisors is an integer number (1733688).

Almost surely, 2^23540909 is an apocalyptic number.

It is an amenable number.

23540909 is a deficient number, since it is larger than the sum of its proper divisors (4198099).

23540909 is a wasteful number, since it uses less digits than its factorization.

23540909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 23540909 is about 4851.8974638795. The cubic root of 23540909 is about 286.5988276166.

The spelling of 23540909 in words is "twenty-three million, five hundred forty thousand, nine hundred nine".