18522011 has 2 divisors, whose sum is σ = 18522012. Its totient is φ = 18522010.

The previous prime is 18521999. The next prime is 18522013. The reversal of 18522011 is 11022581.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18522011 - 2¹⁸ = 18259867 is a prime.

It is a Sophie Germain prime.

Together with 18522013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18522013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9261005 + 9261006.

It is an arithmetic number, because the mean of its divisors is an integer number (9261006).

Almost surely, 2^18522011 is an apocalyptic number.

18522011 is a deficient number, since it is larger than the sum of its proper divisors (1).

18522011 is an equidigital number, since it uses as much as digits as its factorization.

18522011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 18522011 is about 4303.7205996672. The cubic root of 18522011 is about 264.5834728556.

Adding to 18522011 its reverse (11022581), we get a palindrome (29544592).

The spelling of 18522011 in words is "eighteen million, five hundred twenty-two thousand, eleven".