23665636 has 12 divisors (see below), whose sum is σ = 41460412. Its totient is φ = 11819808.

The previous prime is 23665633. The next prime is 23665637. The reversal of 23665636 is 63656632.

It can be written as a sum of positive squares in 2 ways, for example, as 16048036 + 7617600 = 4006^2 + 2760^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23665595 and 23665604.

It is not an unprimeable number, because it can be changed into a prime (23665633) 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, 1666 + ... + 7078.

Almost surely, 2^23665636 is an apocalyptic number.

It is an amenable number.

23665636 is a deficient number, since it is larger than the sum of its proper divisors (17794776).

23665636 is a wasteful number, since it uses less digits than its factorization.

23665636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6510 (or 6508 counting only the distinct ones).

The product of its digits is 116640, while the sum is 37.

The square root of 23665636 is about 4864.7339084476. The cubic root of 23665636 is about 287.1040993112.

The spelling of 23665636 in words is "twenty-three million, six hundred sixty-five thousand, six hundred thirty-six".