18111061 has 2 divisors, whose sum is σ = 18111062. Its totient is φ = 18111060.

The previous prime is 18111031. The next prime is 18111101. The reversal of 18111061 is 16011181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16966161 + 1144900 = 4119^2 + 1070^2 .

It is an emirp because it is prime and its reverse (16011181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18111061 - 2⁵ = 18111029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18111011) 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, 9055530 + 9055531.

It is an arithmetic number, because the mean of its divisors is an integer number (9055531).

Almost surely, 2^18111061 is an apocalyptic number.

It is an amenable number.

18111061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18111061 is an equidigital number, since it uses as much as digits as its factorization.

18111061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 19.

The square root of 18111061 is about 4255.7092240894. The cubic root of 18111061 is about 262.6120386437.

The spelling of 18111061 in words is "eighteen million, one hundred eleven thousand, sixty-one".