18027 has 6 divisors (see below), whose sum is σ = 26052. Its totient is φ = 12012.

The previous prime is 18013. The next prime is 18041. The reversal of 18027 is 72081.

It is an interprime number because it is at equal distance from previous prime (18013) and next prime (18041).

It is not a de Polignac number, because 18027 - 2¹² = 13931 is a prime.

18027 is a modest number, since divided by 27 gives 18 as remainder.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 993 + ... + 1010.

It is an arithmetic number, because the mean of its divisors is an integer number (4342).

2¹⁸⁰²⁷ is an apocalyptic number.

18027 is a deficient number, since it is larger than the sum of its proper divisors (8025).

18027 is a wasteful number, since it uses less digits than its factorization.

18027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 18027 is about 134.2646640036. The cubic root of 18027 is about 26.2205111027.

The spelling of 18027 in words is "eighteen thousand, twenty-seven".