21364767054143 has 2 divisors, whose sum is σ = 21364767054144. Its totient is φ = 21364767054142.

The previous prime is 21364767054107. The next prime is 21364767054149. The reversal of 21364767054143 is 34145076746312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21364767054143 - 2⁶ = 21364767054079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21364767054149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10682383527071 + 10682383527072.

It is an arithmetic number, because the mean of its divisors is an integer number (10682383527072).

Almost surely, 2^{21364767054143} is an apocalyptic number.

21364767054143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21364767054143 is an equidigital number, since it uses as much as digits as its factorization.

21364767054143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 21364767054143 in words is "twenty-one trillion, three hundred sixty-four billion, seven hundred sixty-seven million, fifty-four thousand, one hundred forty-three".