23520043 has 4 divisors (see below), whose sum is σ = 24757960. Its totient is φ = 22282128.

The previous prime is 23520031. The next prime is 23520059. The reversal of 23520043 is 34002532.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23520043 is a prime.

It is a super-3 number, since 3×23520043³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1237897 = 23520043 / (2 + 3 + 5 + 2 + 0 + 0 + 4 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23520043.

It is not an unprimeable number, because it can be changed into a prime (23520083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618930 + ... + 618967.

It is an arithmetic number, because the mean of its divisors is an integer number (6189490).

Almost surely, 2^23520043 is an apocalyptic number.

23520043 is a deficient number, since it is larger than the sum of its proper divisors (1237917).

23520043 is a wasteful number, since it uses less digits than its factorization.

23520043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237916.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 23520043 is about 4849.7466944161. The cubic root of 23520043 is about 286.5141248708.

Adding to 23520043 its reverse (34002532), we get a palindrome (57522575).

The spelling of 23520043 in words is "twenty-three million, five hundred twenty thousand, forty-three".