20442440242423 has 2 divisors, whose sum is σ = 20442440242424. Its totient is φ = 20442440242422.

The previous prime is 20442440242391. The next prime is 20442440242489. The reversal of 20442440242423 is 32424204424402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20442440242423 - 2⁵ = 20442440242391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442440642423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221220121211 + 10221220121212.

It is an arithmetic number, because the mean of its divisors is an integer number (10221220121212).

Almost surely, 2^{20442440242423} is an apocalyptic number.

20442440242423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442440242423 is an equidigital number, since it uses as much as digits as its factorization.

20442440242423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393216, while the sum is 37.

Adding to 20442440242423 its reverse (32424204424402), we get a palindrome (52866644666825).

The spelling of 20442440242423 in words is "twenty trillion, four hundred forty-two billion, four hundred forty million, two hundred forty-two thousand, four hundred twenty-three".