23636 has 12 divisors (see below), whose sum is σ = 43680. Its totient is φ = 11160.

The previous prime is 23633. The next prime is 23663. The reversal of 23636 is 63632.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 231.

It is an arithmetic number, because the mean of its divisors is an integer number (3640).

2²³⁶³⁶ is an apocalyptic number.

It is an amenable number.

23636 is a deficient number, since it is larger than the sum of its proper divisors (20044).

23636 is a wasteful number, since it uses less digits than its factorization.

23636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 332 counting only the distinct ones).

The product of its digits is 648, while the sum is 20.

The square root of 23636 is about 153.7400403278. The cubic root of 23636 is about 28.6984204354.

It can be divided in two parts, 236 and 36, that added together give a palindrome (272).

The spelling of 23636 in words is "twenty-three thousand, six hundred thirty-six".