21243164444603 has 2 divisors, whose sum is σ = 21243164444604. Its totient is φ = 21243164444602.

The previous prime is 21243164444587. The next prime is 21243164444629. The reversal of 21243164444603 is 30644446134212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21243164444603 - 2⁴ = 21243164444587 is a prime.

It is not a weakly prime, because it can be changed into another prime (21243164444503) 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, 10621582222301 + 10621582222302.

It is an arithmetic number, because the mean of its divisors is an integer number (10621582222302).

Almost surely, 2^{21243164444603} is an apocalyptic number.

21243164444603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21243164444603 is an equidigital number, since it uses as much as digits as its factorization.

21243164444603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 21243164444603 in words is "twenty-one trillion, two hundred forty-three billion, one hundred sixty-four million, four hundred forty-four thousand, six hundred three".