22643813305 has 4 divisors (see below), whose sum is σ = 27172575972. Its totient is φ = 18115050640.

The previous prime is 22643813303. The next prime is 22643813359. The reversal of 22643813305 is 50331834622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13842934336 + 8800878969 = 117656^2 + 93813^2 .

It is not a de Polignac number, because 22643813305 - 2¹ = 22643813303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22643813303) 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 3 ways as a sum of consecutive naturals, for example, 2264381326 + ... + 2264381335.

It is an arithmetic number, because the mean of its divisors is an integer number (6793143993).

Almost surely, 2^22643813305 is an apocalyptic number.

It is an amenable number.

22643813305 is a deficient number, since it is larger than the sum of its proper divisors (4528762667).

22643813305 is an equidigital number, since it uses as much as digits as its factorization.

22643813305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528762666.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 22643813305 in words is "twenty-two billion, six hundred forty-three million, eight hundred thirteen thousand, three hundred five".