18105129 has 12 divisors (see below), whose sum is σ = 29887936. Its totient is φ = 10345752.

The previous prime is 18105121. The next prime is 18105151. The reversal of 18105129 is 92150181.

It is not a de Polignac number, because 18105129 - 2³ = 18105121 is a prime.

It is a super-2 number, since 2×18105129² = 655591392213282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18105121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143629 + ... + 143754.

Almost surely, 2^18105129 is an apocalyptic number.

It is an amenable number.

18105129 is a deficient number, since it is larger than the sum of its proper divisors (11782807).

18105129 is a wasteful number, since it uses less digits than its factorization.

18105129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287396 (or 287393 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 18105129 is about 4255.0122208990. The cubic root of 18105129 is about 262.5833639989.

The spelling of 18105129 in words is "eighteen million, one hundred five thousand, one hundred twenty-nine".