22891636109 has 2 divisors, whose sum is σ = 22891636110. Its totient is φ = 22891636108.

The previous prime is 22891636099. The next prime is 22891636169. The reversal of 22891636109 is 90163619822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17490856009 + 5400780100 = 132253^2 + 73490^2 .

It is a cyclic number.

It is not a de Polignac number, because 22891636109 - 2⁸ = 22891635853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22891636169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11445818054 + 11445818055.

It is an arithmetic number, because the mean of its divisors is an integer number (11445818055).

Almost surely, 2^22891636109 is an apocalyptic number.

It is an amenable number.

22891636109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22891636109 is an equidigital number, since it uses as much as digits as its factorization.

22891636109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 22891636109 in words is "twenty-two billion, eight hundred ninety-one million, six hundred thirty-six thousand, one hundred nine".