21922784576639 has 2 divisors, whose sum is σ = 21922784576640. Its totient is φ = 21922784576638.

The previous prime is 21922784576617. The next prime is 21922784576647. The reversal of 21922784576639 is 93667548722912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21922784576639 - 2⁸ = 21922784576383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21922784573639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10961392288319 + 10961392288320.

It is an arithmetic number, because the mean of its divisors is an integer number (10961392288320).

Almost surely, 2^{21922784576639} is an apocalyptic number.

21922784576639 is a deficient number, since it is larger than the sum of its proper divisors (1).

21922784576639 is an equidigital number, since it uses as much as digits as its factorization.

21922784576639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 548674560, while the sum is 71.

The spelling of 21922784576639 in words is "twenty-one trillion, nine hundred twenty-two billion, seven hundred eighty-four million, five hundred seventy-six thousand, six hundred thirty-nine".