18130311 has 10 divisors (see below), whose sum is σ = 27083672. Its totient is φ = 12086820.

The previous prime is 18130309. The next prime is 18130349. The reversal of 18130311 is 11303181.

It is a happy number.

It is not a de Polignac number, because 18130311 - 2¹ = 18130309 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 (18130361) 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 9 ways as a sum of consecutive naturals, for example, 111835 + ... + 111996.

Almost surely, 2^18130311 is an apocalyptic number.

18130311 is a deficient number, since it is larger than the sum of its proper divisors (8953361).

18130311 is an equidigital number, since it uses as much as digits as its factorization.

18130311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223843 (or 223834 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 18130311 is about 4257.9702911129. The cubic root of 18130311 is about 262.7050479514.

Adding to 18130311 its reverse (11303181), we get a palindrome (29433492).

The spelling of 18130311 in words is "eighteen million, one hundred thirty thousand, three hundred eleven".