21343442023 has 2 divisors, whose sum is σ = 21343442024. Its totient is φ = 21343442022.

The previous prime is 21343441993. The next prime is 21343442033. The reversal of 21343442023 is 32024434312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21343442023 - 2⁵ = 21343441991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21343441982 and 21343442000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343442033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671721011 + 10671721012.

It is an arithmetic number, because the mean of its divisors is an integer number (10671721012).

Almost surely, 2^21343442023 is an apocalyptic number.

21343442023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343442023 is an equidigital number, since it uses as much as digits as its factorization.

21343442023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21343442023 its reverse (32024434312), we get a palindrome (53367876335).

The spelling of 21343442023 in words is "twenty-one billion, three hundred forty-three million, four hundred forty-two thousand, twenty-three".