23663506 has 4 divisors (see below), whose sum is σ = 35495262. Its totient is φ = 11831752.

The previous prime is 23663501. The next prime is 23663533. The reversal of 23663506 is 60536632.

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

It can be written as a sum of positive squares in only one way, i.e., 14753281 + 8910225 = 3841^2 + 2985^2 .

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 not an unprimeable number, because it can be changed into a prime (23663501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5915875 + ... + 5915878.

Almost surely, 2^23663506 is an apocalyptic number.

23663506 is a deficient number, since it is larger than the sum of its proper divisors (11831756).

23663506 is a wasteful number, since it uses less digits than its factorization.

23663506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11831755.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 23663506 is about 4864.5149809616. The cubic root of 23663506 is about 287.0954855547.

The spelling of 23663506 in words is "twenty-three million, six hundred sixty-three thousand, five hundred six".