18111029 has 2 divisors, whose sum is σ = 18111030. Its totient is φ = 18111028.

The previous prime is 18111013. The next prime is 18111031. The reversal of 18111029 is 92011181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12460900 + 5650129 = 3530^2 + 2377^2 .

It is a cyclic number.

It is not a de Polignac number, because 18111029 - 2⁴ = 18111013 is a prime.

Together with 18111031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18110995 and 18111013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18111229) 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, 9055514 + 9055515.

It is an arithmetic number, because the mean of its divisors is an integer number (9055515).

Almost surely, 2^18111029 is an apocalyptic number.

It is an amenable number.

18111029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18111029 is an equidigital number, since it uses as much as digits as its factorization.

18111029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 18111029 is about 4255.7054644324. The cubic root of 18111029 is about 262.6118839760.

The spelling of 18111029 in words is "eighteen million, one hundred eleven thousand, twenty-nine".