18000027 has 6 divisors (see below), whose sum is σ = 26000052. Its totient is φ = 12000012.

The previous prime is 17999987. The next prime is 18000041. The reversal of 18000027 is 72000081.

It is not a de Polignac number, because 18000027 - 2⁷ = 17999899 is a prime.

18000027 is a modest number, since divided by 27 gives 18 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 17999973 and 18000009.

It is not an unprimeable number, because it can be changed into a prime (18000067) 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 in 5 ways as a sum of consecutive naturals, for example, 999993 + ... + 1000010.

It is an arithmetic number, because the mean of its divisors is an integer number (4333342).

Almost surely, 2^18000027 is an apocalyptic number.

18000027 is a deficient number, since it is larger than the sum of its proper divisors (8000025).

18000027 is a wasteful number, since it uses less digits than its factorization.

18000027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000009 (or 2000006 counting only the distinct ones).

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

The square root of 18000027 is about 4242.6438690986. The cubic root of 18000027 is about 262.0742704579.

The spelling of 18000027 in words is "eighteen million, twenty-seven", and thus it is an aban number and an uban number.