21622339439 has 2 divisors, whose sum is σ = 21622339440. Its totient is φ = 21622339438.

The previous prime is 21622339393. The next prime is 21622339447. The reversal of 21622339439 is 93493322612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21622339439 - 2¹⁶ = 21622273903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21622339439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21622339489) 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, 10811169719 + 10811169720.

It is an arithmetic number, because the mean of its divisors is an integer number (10811169720).

Almost surely, 2^21622339439 is an apocalyptic number.

21622339439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21622339439 is an equidigital number, since it uses as much as digits as its factorization.

21622339439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 44.

The spelling of 21622339439 in words is "twenty-one billion, six hundred twenty-two million, three hundred thirty-nine thousand, four hundred thirty-nine".