18130215 has 8 divisors (see below), whose sum is σ = 29008368. Its totient is φ = 9669440.

The previous prime is 18130213. The next prime is 18130243. The reversal of 18130215 is 51203181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18130215 - 2¹ = 18130213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18130191 and 18130200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130213) 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 7 ways as a sum of consecutive naturals, for example, 604326 + ... + 604355.

It is an arithmetic number, because the mean of its divisors is an integer number (3626046).

Almost surely, 2^18130215 is an apocalyptic number.

18130215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18130215 is a deficient number, since it is larger than the sum of its proper divisors (10878153).

18130215 is a wasteful number, since it uses less digits than its factorization.

18130215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208689.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 18130215 is about 4257.9590181212. The cubic root of 18130215 is about 262.7045842762.

Adding to 18130215 its reverse (51203181), we get a palindrome (69333396).

The spelling of 18130215 in words is "eighteen million, one hundred thirty thousand, two hundred fifteen".