23566945 has 4 divisors (see below), whose sum is σ = 28280340. Its totient is φ = 18853552.

The previous prime is 23566943. The next prime is 23566951. The reversal of 23566945 is 54966532.

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 18258529 + 5308416 = 4273^2 + 2304^2 .

It is a cyclic number.

It is not a de Polignac number, because 23566945 - 2¹ = 23566943 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 23566898 and 23566907.

It is not an unprimeable number, because it can be changed into a prime (23566943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2356690 + ... + 2356699.

It is an arithmetic number, because the mean of its divisors is an integer number (7070085).

Almost surely, 2^23566945 is an apocalyptic number.

It is an amenable number.

23566945 is a deficient number, since it is larger than the sum of its proper divisors (4713395).

23566945 is an equidigital number, since it uses as much as digits as its factorization.

23566945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713394.

The product of its digits is 194400, while the sum is 40.

The square root of 23566945 is about 4854.5797964396. The cubic root of 23566945 is about 286.7044471269.

The spelling of 23566945 in words is "twenty-three million, five hundred sixty-six thousand, nine hundred forty-five".