23640343 has 4 divisors (see below), whose sum is σ = 24668208. Its totient is φ = 22612480.

The previous prime is 23640341. The next prime is 23640349. The reversal of 23640343 is 34304632.

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

It is a cyclic number.

It is not a de Polignac number, because 23640343 - 2¹ = 23640341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640341) 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, 513898 + ... + 513943.

It is an arithmetic number, because the mean of its divisors is an integer number (6167052).

Almost surely, 2^23640343 is an apocalyptic number.

23640343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

23640343 is a deficient number, since it is larger than the sum of its proper divisors (1027865).

23640343 is a wasteful number, since it uses less digits than its factorization.

23640343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027864.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 23640343 is about 4862.1335851661. The cubic root of 23640343 is about 287.0017805941.

Adding to 23640343 its reverse (34304632), we get a palindrome (57944975).

The spelling of 23640343 in words is "twenty-three million, six hundred forty thousand, three hundred forty-three".