21444324023 has 2 divisors, whose sum is σ = 21444324024. Its totient is φ = 21444324022.

The previous prime is 21444324019. The next prime is 21444324119. The reversal of 21444324023 is 32042344412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21444324023 - 2² = 21444324019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21444324323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722162011 + 10722162012.

It is an arithmetic number, because the mean of its divisors is an integer number (10722162012).

Almost surely, 2^21444324023 is an apocalyptic number.

21444324023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21444324023 is an equidigital number, since it uses as much as digits as its factorization.

21444324023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21444324023 its reverse (32042344412), we get a palindrome (53486668435).

The spelling of 21444324023 in words is "twenty-one billion, four hundred forty-four million, three hundred twenty-four thousand, twenty-three".