22405838549 has 2 divisors, whose sum is σ = 22405838550. Its totient is φ = 22405838548.

The previous prime is 22405838513. The next prime is 22405838557. The reversal of 22405838549 is 94583850422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22378065649 + 27772900 = 149593^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 22405838549 - 2²⁴ = 22389061333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22405838497 and 22405838506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22405838249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11202919274 + 11202919275.

It is an arithmetic number, because the mean of its divisors is an integer number (11202919275).

Almost surely, 2^22405838549 is an apocalyptic number.

It is an amenable number.

22405838549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22405838549 is an equidigital number, since it uses as much as digits as its factorization.

22405838549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 22405838549 in words is "twenty-two billion, four hundred five million, eight hundred thirty-eight thousand, five hundred forty-nine".