18340318 has 8 divisors (see below), whose sum is σ = 27542880. Its totient is φ = 9159360.

The previous prime is 18340307. The next prime is 18340349. The reversal of 18340318 is 81304381.

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

It is a super-2 number, since 2×18340318² = 672734528682248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (3442860).

Almost surely, 2^18340318 is an apocalyptic number.

18340318 is a deficient number, since it is larger than the sum of its proper divisors (9202562).

18340318 is an equidigital number, since it uses as much as digits as its factorization.

18340318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10802.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18340318 is about 4282.5597485616. The cubic root of 18340318 is about 263.7154782127.

Adding to 18340318 its reverse (81304381), we get a palindrome (99644699).

The spelling of 18340318 in words is "eighteen million, three hundred forty thousand, three hundred eighteen".