22220020445 has 12 divisors (see below), whose sum is σ = 31017335004. Its totient is φ = 15236585280.

The previous prime is 22220020411. The next prime is 22220020447. The reversal of 22220020445 is 54402002222.

It can be written as a sum of positive squares in 2 ways, for example, as 11491411204 + 10728609241 = 107198^2 + 103579^2 .

It is not a de Polignac number, because 22220020445 - 2¹⁴ = 22220004061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22220020445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220020447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45346736 + ... + 45347225.

It is an arithmetic number, because the mean of its divisors is an integer number (2584777917).

Almost surely, 2^22220020445 is an apocalyptic number.

It is an amenable number.

22220020445 is a deficient number, since it is larger than the sum of its proper divisors (8797314559).

22220020445 is an equidigital number, since it uses as much as digits as its factorization.

22220020445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90693980 (or 90693973 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

Adding to 22220020445 its reverse (54402002222), we get a palindrome (76622022667).

The spelling of 22220020445 in words is "twenty-two billion, two hundred twenty million, twenty thousand, four hundred forty-five".