22211985637 has 2 divisors, whose sum is σ = 22211985638. Its totient is φ = 22211985636.

The previous prime is 22211985623. The next prime is 22211985643. The reversal of 22211985637 is 73658911222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15369552676 + 6842432961 = 123974^2 + 82719^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211985637 - 2¹¹ = 22211983589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22211985617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105992818 + 11105992819.

It is an arithmetic number, because the mean of its divisors is an integer number (11105992819).

Almost surely, 2^22211985637 is an apocalyptic number.

It is an amenable number.

22211985637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211985637 is an equidigital number, since it uses as much as digits as its factorization.

22211985637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The spelling of 22211985637 in words is "twenty-two billion, two hundred eleven million, nine hundred eighty-five thousand, six hundred thirty-seven".