18065003 has 4 divisors (see below), whose sum is σ = 19707288. Its totient is φ = 16422720.

The previous prime is 18064973. The next prime is 18065023. The reversal of 18065003 is 30056081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18065003 - 2⁸ = 18064747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18065003.

It is not an unprimeable number, because it can be changed into a prime (18065023) 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, 821126 + ... + 821147.

It is an arithmetic number, because the mean of its divisors is an integer number (4926822).

Almost surely, 2^18065003 is an apocalyptic number.

18065003 is a deficient number, since it is larger than the sum of its proper divisors (1642285).

18065003 is a wasteful number, since it uses less digits than its factorization.

18065003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642284.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 18065003 is about 4250.2944603874. The cubic root of 18065003 is about 262.3892345979.

The spelling of 18065003 in words is "eighteen million, sixty-five thousand, three".