21413406208463 has 2 divisors, whose sum is σ = 21413406208464. Its totient is φ = 21413406208462.

The previous prime is 21413406208427. The next prime is 21413406208471. The reversal of 21413406208463 is 36480260431412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21413406208463 - 2²⁸ = 21413137773007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21413406208483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706703104231 + 10706703104232.

It is an arithmetic number, because the mean of its divisors is an integer number (10706703104232).

Almost surely, 2^{21413406208463} is an apocalyptic number.

21413406208463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21413406208463 is an equidigital number, since it uses as much as digits as its factorization.

21413406208463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 44.

Adding to 21413406208463 its reverse (36480260431412), we get a palindrome (57893666639875).

The spelling of 21413406208463 in words is "twenty-one trillion, four hundred thirteen billion, four hundred six million, two hundred eight thousand, four hundred sixty-three".