18122318 has 16 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 8930616.

The previous prime is 18122317. The next prime is 18122327. The reversal of 18122318 is 81322181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79721 + ... + 79947.

It is an arithmetic number, because the mean of its divisors is an integer number (1723680).

Almost surely, 2^18122318 is an apocalyptic number.

18122318 is a deficient number, since it is larger than the sum of its proper divisors (9456562).

18122318 is a wasteful number, since it uses less digits than its factorization.

18122318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 768, while the sum is 26.

The square root of 18122318 is about 4257.0315949027. The cubic root of 18122318 is about 262.6664365509. Note that the first 3 decimals are identical.

Adding to 18122318 its reverse (81322181), we get a palindrome (99444499).

The spelling of 18122318 in words is "eighteen million, one hundred twenty-two thousand, three hundred eighteen".