22180009 has 2 divisors, whose sum is σ = 22180010. Its totient is φ = 22180008.

The previous prime is 22179977. The next prime is 22180013. The reversal of 22180009 is 90008122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12938409 + 9241600 = 3597^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 22180009 - 2⁵ = 22179977 is a prime.

It is not a weakly prime, because it can be changed into another prime (22180309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11090004 + 11090005.

It is an arithmetic number, because the mean of its divisors is an integer number (11090005).

Almost surely, 2^22180009 is an apocalyptic number.

It is an amenable number.

22180009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22180009 is an equidigital number, since it uses as much as digits as its factorization.

22180009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 22180009 is about 4709.5656912289. The cubic root of 22180009 is about 280.9660888735.

The spelling of 22180009 in words is "twenty-two million, one hundred eighty thousand, nine".