21400244535463 has 2 divisors, whose sum is σ = 21400244535464. Its totient is φ = 21400244535462.

The previous prime is 21400244535427. The next prime is 21400244535473. The reversal of 21400244535463 is 36453544200412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21400244535463 - 2¹³ = 21400244527271 is a prime.

It is a super-2 number, since 2×21400244535463² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21400244535473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700122267731 + 10700122267732.

It is an arithmetic number, because the mean of its divisors is an integer number (10700122267732).

Almost surely, 2^{21400244535463} is an apocalyptic number.

21400244535463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21400244535463 is an equidigital number, since it uses as much as digits as its factorization.

21400244535463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 43.

Adding to 21400244535463 its reverse (36453544200412), we get a palindrome (57853788735875).

The spelling of 21400244535463 in words is "twenty-one trillion, four hundred billion, two hundred forty-four million, five hundred thirty-five thousand, four hundred sixty-three".