23506645 has 4 divisors (see below), whose sum is σ = 28207980. Its totient is φ = 18805312.

The previous prime is 23506607. The next prime is 23506661. The reversal of 23506645 is 54660532.

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 16313521 + 7193124 = 4039^2 + 2682^2 .

It is a cyclic number.

It is not a de Polignac number, because 23506645 - 2⁷ = 23506517 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 2350660 + ... + 2350669.

It is an arithmetic number, because the mean of its divisors is an integer number (7051995).

Almost surely, 2^23506645 is an apocalyptic number.

It is an amenable number.

23506645 is a deficient number, since it is larger than the sum of its proper divisors (4701335).

23506645 is an equidigital number, since it uses as much as digits as its factorization.

23506645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701334.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 23506645 is about 4848.3651883908. The cubic root of 23506645 is about 286.4597110619.

The spelling of 23506645 in words is "twenty-three million, five hundred six thousand, six hundred forty-five".