23440423 has 2 divisors, whose sum is σ = 23440424. Its totient is φ = 23440422.

The previous prime is 23440421. The next prime is 23440441. The reversal of 23440423 is 32404432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23440423 - 2¹ = 23440421 is a prime.

Together with 23440421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23440394 and 23440403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23440421) 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 as a sum of consecutive naturals, namely, 11720211 + 11720212.

It is an arithmetic number, because the mean of its divisors is an integer number (11720212).

Almost surely, 2^23440423 is an apocalyptic number.

23440423 is a deficient number, since it is larger than the sum of its proper divisors (1).

23440423 is an equidigital number, since it uses as much as digits as its factorization.

23440423 is an odious number, because the sum of its binary digits is odd.

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

The square root of 23440423 is about 4841.5310594893. The cubic root of 23440423 is about 286.1904570317.

Adding to 23440423 its reverse (32404432), we get a palindrome (55844855).

The spelling of 23440423 in words is "twenty-three million, four hundred forty thousand, four hundred twenty-three".