23236809 has 16 divisors (see below), whose sum is σ = 31703040. Its totient is φ = 15135120.

The previous prime is 23236789. The next prime is 23236817. The reversal of 23236809 is 90863232.

It is not a de Polignac number, because 23236809 - 2⁸ = 23236553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23236809.

It is not an unprimeable number, because it can be changed into a prime (23236009) 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, 26622 + ... + 27480.

It is an arithmetic number, because the mean of its divisors is an integer number (1981440).

Almost surely, 2^23236809 is an apocalyptic number.

23236809 is the 2577-th nonagonal number.

It is an amenable number.

23236809 is a deficient number, since it is larger than the sum of its proper divisors (8466231).

23236809 is a wasteful number, since it uses less digits than its factorization.

23236809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 23236809 is about 4820.4573434478. The cubic root of 23236809 is about 285.3593865718.

The spelling of 23236809 in words is "twenty-three million, two hundred thirty-six thousand, eight hundred nine".