21442622624413 has 2 divisors, whose sum is σ = 21442622624414. Its totient is φ = 21442622624412.

The previous prime is 21442622624333. The next prime is 21442622624431. The reversal of 21442622624413 is 31442622624412.

It is a happy number.

Together with next prime (21442622624431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21253326277689 + 189296346724 = 4610133^2 + 435082^2 .

It is a cyclic number.

It is not a de Polignac number, because 21442622624413 - 2¹³ = 21442622616221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21442622624413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21442622622413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721311312206 + 10721311312207.

It is an arithmetic number, because the mean of its divisors is an integer number (10721311312207).

Almost surely, 2^{21442622624413} is an apocalyptic number.

It is an amenable number.

21442622624413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442622624413 is an equidigital number, since it uses as much as digits as its factorization.

21442622624413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 43.

Subtracting 21442622624413 from its reverse (31442622624412), we obtain a palindrome (9999999999999).

The spelling of 21442622624413 in words is "twenty-one trillion, four hundred forty-two billion, six hundred twenty-two million, six hundred twenty-four thousand, four hundred thirteen".