18110161 has 2 divisors, whose sum is σ = 18110162. Its totient is φ = 18110160.

The previous prime is 18110149. The next prime is 18110179. The reversal of 18110161 is 16101181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11350161 + 6760000 = 3369^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 18110161 - 2⁵ = 18110129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18110101) 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, 9055080 + 9055081.

It is an arithmetic number, because the mean of its divisors is an integer number (9055081).

Almost surely, 2^18110161 is an apocalyptic number.

It is an amenable number.

18110161 is a deficient number, since it is larger than the sum of its proper divisors (1).

18110161 is an equidigital number, since it uses as much as digits as its factorization.

18110161 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 18110161 is about 4255.6034824687. The cubic root of 18110161 is about 262.6076885442.

The spelling of 18110161 in words is "eighteen million, one hundred ten thousand, one hundred sixty-one".