21330214642439 has 2 divisors, whose sum is σ = 21330214642440. Its totient is φ = 21330214642438.

The previous prime is 21330214642393. The next prime is 21330214642493. The reversal of 21330214642439 is 93424641203312.

Together with next prime (21330214642493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21330214642439 - 2²⁰ = 21330213593863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21330214642439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330214642339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665107321219 + 10665107321220.

It is an arithmetic number, because the mean of its divisors is an integer number (10665107321220).

Almost surely, 2^{21330214642439} is an apocalyptic number.

21330214642439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330214642439 is an equidigital number, since it uses as much as digits as its factorization.

21330214642439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 21330214642439 in words is "twenty-one trillion, three hundred thirty billion, two hundred fourteen million, six hundred forty-two thousand, four hundred thirty-nine".