18111007 has 2 divisors, whose sum is σ = 18111008. Its totient is φ = 18111006.

The previous prime is 18110977. The next prime is 18111011. The reversal of 18111007 is 70011181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18111007 - 2⁷ = 18110879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18112007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9055503 + 9055504.

It is an arithmetic number, because the mean of its divisors is an integer number (9055504).

Almost surely, 2^18111007 is an apocalyptic number.

18111007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18111007 is an equidigital number, since it uses as much as digits as its factorization.

18111007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

The square root of 18111007 is about 4255.7028796663. The cubic root of 18111007 is about 262.6117776418.

Adding to 18111007 its reverse (70011181), we get a palindrome (88122188).

The spelling of 18111007 in words is "eighteen million, one hundred eleven thousand, seven".