21786365413063 has 2 divisors, whose sum is σ = 21786365413064. Its totient is φ = 21786365413062.

The previous prime is 21786365413061. The next prime is 21786365413147. The reversal of 21786365413063 is 36031456368712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21786365413063 - 2¹ = 21786365413061 is a prime.

It is a super-2 number, since 2×21786365413063² (a number of 27 digits) contains 22 as substring.

Together with 21786365413061, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21786365412995 and 21786365413013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21786365413061) 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, 10893182706531 + 10893182706532.

It is an arithmetic number, because the mean of its divisors is an integer number (10893182706532).

Almost surely, 2^{21786365413063} is an apocalyptic number.

21786365413063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21786365413063 is an equidigital number, since it uses as much as digits as its factorization.

21786365413063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 21786365413063 in words is "twenty-one trillion, seven hundred eighty-six billion, three hundred sixty-five million, four hundred thirteen thousand, sixty-three".