21423424323559 has 2 divisors, whose sum is σ = 21423424323560. Its totient is φ = 21423424323558.

The previous prime is 21423424323527. The next prime is 21423424323563. The reversal of 21423424323559 is 95532342432412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21423424323559 - 2⁵ = 21423424323527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21423427323559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711712161779 + 10711712161780.

It is an arithmetic number, because the mean of its divisors is an integer number (10711712161780).

Almost surely, 2^{21423424323559} is an apocalyptic number.

21423424323559 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423424323559 is an equidigital number, since it uses as much as digits as its factorization.

21423424323559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 49.

The spelling of 21423424323559 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, three hundred twenty-three thousand, five hundred fifty-nine".