18030911 has 2 divisors, whose sum is σ = 18030912. Its totient is φ = 18030910.

The previous prime is 18030907. The next prime is 18030923. The reversal of 18030911 is 11903081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18030911 - 2² = 18030907 is a prime.

It is a super-2 number, since 2×18030911² = 650227502979842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18030811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015455 + 9015456.

It is an arithmetic number, because the mean of its divisors is an integer number (9015456).

Almost surely, 2^18030911 is an apocalyptic number.

18030911 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030911 is an equidigital number, since it uses as much as digits as its factorization.

18030911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 18030911 is about 4246.2820207801. The cubic root of 18030911 is about 262.2240716604.

Adding to 18030911 its reverse (11903081), we get a palindrome (29933992).

The spelling of 18030911 in words is "eighteen million, thirty thousand, nine hundred eleven".