18171059 has 2 divisors, whose sum is σ = 18171060. Its totient is φ = 18171058.

The previous prime is 18171047. The next prime is 18171073. The reversal of 18171059 is 95017181.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18171059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18171019) 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, 9085529 + 9085530.

It is an arithmetic number, because the mean of its divisors is an integer number (9085530).

Almost surely, 2^18171059 is an apocalyptic number.

18171059 is a deficient number, since it is larger than the sum of its proper divisors (1).

18171059 is an equidigital number, since it uses as much as digits as its factorization.

18171059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 18171059 is about 4262.7525145145. The cubic root of 18171059 is about 262.9017111647.

The spelling of 18171059 in words is "eighteen million, one hundred seventy-one thousand, fifty-nine".