22020221085637 has 2 divisors, whose sum is σ = 22020221085638. Its totient is φ = 22020221085636.

The previous prime is 22020221085619. The next prime is 22020221085649. The reversal of 22020221085637 is 73658012202022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18936126652356 + 3084094433281 = 4351566^2 + 1756159^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020221085637 - 2³⁵ = 21985861347269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22020221085637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22020221005637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010110542818 + 11010110542819.

It is an arithmetic number, because the mean of its divisors is an integer number (11010110542819).

Almost surely, 2^{22020221085637} is an apocalyptic number.

It is an amenable number.

22020221085637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020221085637 is an equidigital number, since it uses as much as digits as its factorization.

22020221085637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 40.

Adding to 22020221085637 its reverse (73658012202022), we get a palindrome (95678233287659).

The spelling of 22020221085637 in words is "twenty-two trillion, twenty billion, two hundred twenty-one million, eighty-five thousand, six hundred thirty-seven".