21343232423 has 2 divisors, whose sum is σ = 21343232424. Its totient is φ = 21343232422.

The previous prime is 21343232413. The next prime is 21343232441. The reversal of 21343232423 is 32423234312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21343232423 - 2¹⁴ = 21343216039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343232413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671616211 + 10671616212.

It is an arithmetic number, because the mean of its divisors is an integer number (10671616212).

Almost surely, 2^21343232423 is an apocalyptic number.

21343232423 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343232423 is an equidigital number, since it uses as much as digits as its factorization.

21343232423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 29.

Adding to 21343232423 its reverse (32423234312), we get a palindrome (53766466735).

The spelling of 21343232423 in words is "twenty-one billion, three hundred forty-three million, two hundred thirty-two thousand, four hundred twenty-three".