23643543 has 32 divisors (see below), whose sum is σ = 41379840. Its totient is φ = 11633760.

The previous prime is 23643541. The next prime is 23643551. The reversal of 23643543 is 34534632.

It is not a de Polignac number, because 23643543 - 2¹ = 23643541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23643543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23643541) 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 31 ways as a sum of consecutive naturals, for example, 1696 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (1293120).

Almost surely, 2^23643543 is an apocalyptic number.

23643543 is a deficient number, since it is larger than the sum of its proper divisors (17736297).

23643543 is a wasteful number, since it uses less digits than its factorization.

23643543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427.

The product of its digits is 25920, while the sum is 30.

The square root of 23643543 is about 4862.4626476714. The cubic root of 23643543 is about 287.0147297049.

The spelling of 23643543 in words is "twenty-three million, six hundred forty-three thousand, five hundred forty-three".