18132871 has 2 divisors, whose sum is σ = 18132872. Its totient is φ = 18132870.

The previous prime is 18132857. The next prime is 18132887. The reversal of 18132871 is 17823181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18132871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18132811) 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, 9066435 + 9066436.

It is an arithmetic number, because the mean of its divisors is an integer number (9066436).

Almost surely, 2^18132871 is an apocalyptic number.

18132871 is a deficient number, since it is larger than the sum of its proper divisors (1).

18132871 is an equidigital number, since it uses as much as digits as its factorization.

18132871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 18132871 is about 4258.2708932148. The cubic root of 18132871 is about 262.7174120208.

The spelling of 18132871 in words is "eighteen million, one hundred thirty-two thousand, eight hundred seventy-one".