21443494565027 has 2 divisors, whose sum is σ = 21443494565028. Its totient is φ = 21443494565026.

The previous prime is 21443494564993. The next prime is 21443494565041. The reversal of 21443494565027 is 72056549434412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21443494565027 - 2⁸ = 21443494564771 is a prime.

It is not a weakly prime, because it can be changed into another prime (21443494565047) 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, 10721747282513 + 10721747282514.

It is an arithmetic number, because the mean of its divisors is an integer number (10721747282514).

Almost surely, 2^{21443494565027} is an apocalyptic number.

21443494565027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21443494565027 is an equidigital number, since it uses as much as digits as its factorization.

21443494565027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29030400, while the sum is 56.

The spelling of 21443494565027 in words is "twenty-one trillion, four hundred forty-three billion, four hundred ninety-four million, five hundred sixty-five thousand, twenty-seven".