21431332323463 has 2 divisors, whose sum is σ = 21431332323464. Its totient is φ = 21431332323462.

The previous prime is 21431332323433. The next prime is 21431332323473. The reversal of 21431332323463 is 36432323313412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21431332323463 - 2¹³ = 21431332315271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21431332323433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715666161731 + 10715666161732.

It is an arithmetic number, because the mean of its divisors is an integer number (10715666161732).

Almost surely, 2^{21431332323463} is an apocalyptic number.

21431332323463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21431332323463 is an equidigital number, since it uses as much as digits as its factorization.

21431332323463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 40.

Adding to 21431332323463 its reverse (36432323313412), we get a palindrome (57863655636875).

The spelling of 21431332323463 in words is "twenty-one trillion, four hundred thirty-one billion, three hundred thirty-two million, three hundred twenty-three thousand, four hundred sixty-three".