23136805 has 4 divisors (see below), whose sum is σ = 27764172. Its totient is φ = 18509440.

The previous prime is 23136769. The next prime is 23136811. The reversal of 23136805 is 50863132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 6220036 = 4113^2 + 2494^2 .

It is not a de Polignac number, because 23136805 - 2¹³ = 23128613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2313676 + ... + 2313685.

It is an arithmetic number, because the mean of its divisors is an integer number (6941043).

Almost surely, 2^23136805 is an apocalyptic number.

It is an amenable number.

23136805 is a deficient number, since it is larger than the sum of its proper divisors (4627367).

23136805 is an equidigital number, since it uses as much as digits as its factorization.

23136805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4627366.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23136805 is about 4810.0732842650. The cubic root of 23136805 is about 284.9494318817.

Adding to 23136805 its reverse (50863132), we get a palindrome (73999937).

The spelling of 23136805 in words is "twenty-three million, one hundred thirty-six thousand, eight hundred five".