22205204377 has 2 divisors, whose sum is σ = 22205204378. Its totient is φ = 22205204376.

The previous prime is 22205204353. The next prime is 22205204393. The reversal of 22205204377 is 77340250222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16664486281 + 5540718096 = 129091^2 + 74436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22205204377 is a prime.

It is a super-2 number, since 2×22205204377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22205264377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11102602188 + 11102602189.

It is an arithmetic number, because the mean of its divisors is an integer number (11102602189).

Almost surely, 2^22205204377 is an apocalyptic number.

It is an amenable number.

22205204377 is a deficient number, since it is larger than the sum of its proper divisors (1).

22205204377 is an equidigital number, since it uses as much as digits as its factorization.

22205204377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 34.

Adding to 22205204377 its reverse (77340250222), we get a palindrome (99545454599).

The spelling of 22205204377 in words is "twenty-two billion, two hundred five million, two hundred four thousand, three hundred seventy-seven".