18016027 has 4 divisors (see below), whose sum is σ = 18088056. Its totient is φ = 17944000.

The previous prime is 18016021. The next prime is 18016043. The reversal of 18016027 is 72061081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72061081 = 31 ⋅2324551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18016027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18015992 and 18016010.

It is not an unprimeable number, because it can be changed into a prime (18016021) 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 in 3 ways as a sum of consecutive naturals, for example, 35638 + ... + 36139.

It is an arithmetic number, because the mean of its divisors is an integer number (4522014).

Almost surely, 2^18016027 is an apocalyptic number.

18016027 is a deficient number, since it is larger than the sum of its proper divisors (72029).

18016027 is an equidigital number, since it uses as much as digits as its factorization.

18016027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72028.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18016027 is about 4244.5290669284. The cubic root of 18016027 is about 262.1518989806.

The spelling of 18016027 in words is "eighteen million, sixteen thousand, twenty-seven".