21441214439 has 2 divisors, whose sum is σ = 21441214440. Its totient is φ = 21441214438.

The previous prime is 21441214433. The next prime is 21441214441. The reversal of 21441214439 is 93441214412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21441214439 is a prime.

Together with 21441214441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21441214399 and 21441214408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21441214433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720607219 + 10720607220.

It is an arithmetic number, because the mean of its divisors is an integer number (10720607220).

Almost surely, 2^21441214439 is an apocalyptic number.

21441214439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441214439 is an equidigital number, since it uses as much as digits as its factorization.

21441214439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The spelling of 21441214439 in words is "twenty-one billion, four hundred forty-one million, two hundred fourteen thousand, four hundred thirty-nine".