23420443 has 2 divisors, whose sum is σ = 23420444. Its totient is φ = 23420442.

The previous prime is 23420437. The next prime is 23420447. The reversal of 23420443 is 34402432.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23420443 is a prime.

It is not a weakly prime, because it can be changed into another prime (23420447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710221 + 11710222.

It is an arithmetic number, because the mean of its divisors is an integer number (11710222).

Almost surely, 2^23420443 is an apocalyptic number.

23420443 is a deficient number, since it is larger than the sum of its proper divisors (1).

23420443 is an equidigital number, since it uses as much as digits as its factorization.

23420443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 23420443 is about 4839.4672227426. The cubic root of 23420443 is about 286.1091201783.

Adding to 23420443 its reverse (34402432), we get a palindrome (57822875).

The spelling of 23420443 in words is "twenty-three million, four hundred twenty thousand, four hundred forty-three".