23664543 has 16 divisors (see below), whose sum is σ = 36128256. Its totient is φ = 13497120.

The previous prime is 23664521. The next prime is 23664581. The reversal of 23664543 is 34546632.

It is not a de Polignac number, because 23664543 - 2⁶ = 23664479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23664593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21105 + ... + 22197.

It is an arithmetic number, because the mean of its divisors is an integer number (2258016).

Almost surely, 2^23664543 is an apocalyptic number.

23664543 is a deficient number, since it is larger than the sum of its proper divisors (12463713).

23664543 is a wasteful number, since it uses less digits than its factorization.

23664543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its digits is 51840, while the sum is 33.

The square root of 23664543 is about 4864.6215680153. The cubic root of 23664543 is about 287.0996792651.

The spelling of 23664543 in words is "twenty-three million, six hundred sixty-four thousand, five hundred forty-three".