18027745 has 16 divisors (see below), whose sum is σ = 22965120. Its totient is φ = 13556224.

The previous prime is 18027731. The next prime is 18027761. The reversal of 18027745 is 54772081.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18027745 - 2¹⁷ = 17896673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18027745.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5457 + ... + 8113.

It is an arithmetic number, because the mean of its divisors is an integer number (1435320).

Almost surely, 2^18027745 is an apocalyptic number.

It is an amenable number.

18027745 is a deficient number, since it is larger than the sum of its proper divisors (4937375).

18027745 is a wasteful number, since it uses less digits than its factorization.

18027745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 18027745 is about 4245.9092076963. The cubic root of 18027745 is about 262.2087230182.

The spelling of 18027745 in words is "eighteen million, twenty-seven thousand, seven hundred forty-five".