18194129 has 2 divisors, whose sum is σ = 18194130. Its totient is φ = 18194128.

The previous prime is 18194093. The next prime is 18194159. The reversal of 18194129 is 92149181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13140625 + 5053504 = 3625^2 + 2248^2 .

It is a cyclic number.

It is not a de Polignac number, because 18194129 - 2²⁴ = 1416913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18194159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9097064 + 9097065.

It is an arithmetic number, because the mean of its divisors is an integer number (9097065).

Almost surely, 2^18194129 is an apocalyptic number.

It is an amenable number.

18194129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18194129 is an equidigital number, since it uses as much as digits as its factorization.

18194129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 18194129 is about 4265.4576542266. The cubic root of 18194129 is about 263.0129242301.

The spelling of 18194129 in words is "eighteen million, one hundred ninety-four thousand, one hundred twenty-nine".