18012303 has 12 divisors (see below), whose sum is σ = 26721448. Its totient is φ = 11683440.

The previous prime is 18012259. The next prime is 18012307. The reversal of 18012303 is 30321081.

It is not a de Polignac number, because 18012303 - 2⁸ = 18012047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18012307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26713 + ... + 27378.

Almost surely, 2^18012303 is an apocalyptic number.

18012303 is a deficient number, since it is larger than the sum of its proper divisors (8709145).

18012303 is a wasteful number, since it uses less digits than its factorization.

18012303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54134 (or 54131 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18012303 is about 4244.0903619032. The cubic root of 18012303 is about 262.1338350471.

Adding to 18012303 its reverse (30321081), we get a palindrome (48333384).

The spelling of 18012303 in words is "eighteen million, twelve thousand, three hundred three".