18027747 has 6 divisors (see below), whose sum is σ = 26040092. Its totient is φ = 12018492.

The previous prime is 18027731. The next prime is 18027761. The reversal of 18027747 is 74772081.

It is not a de Polignac number, because 18027747 - 2⁴ = 18027731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18027727) 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, 1001533 + ... + 1001550.

Almost surely, 2^18027747 is an apocalyptic number.

18027747 is a deficient number, since it is larger than the sum of its proper divisors (8012345).

18027747 is a wasteful number, since it uses less digits than its factorization.

18027747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003089 (or 2003086 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 18027747 is about 4245.9094432171. The cubic root of 18027747 is about 262.2087327147.

The spelling of 18027747 in words is "eighteen million, twenty-seven thousand, seven hundred forty-seven".