18303118 has 32 divisors (see below), whose sum is σ = 31687200. Its totient is φ = 7870464.

The previous prime is 18303091. The next prime is 18303121. The reversal of 18303118 is 81130381.

It is a junction number, because it is equal to n+sod(n) for n = 18303092 and 18303101.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18246 + ... + 19222.

It is an arithmetic number, because the mean of its divisors is an integer number (990225).

Almost surely, 2^18303118 is an apocalyptic number.

18303118 is a deficient number, since it is larger than the sum of its proper divisors (13384082).

18303118 is a wasteful number, since it uses less digits than its factorization.

18303118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18303118 is about 4278.2143471313. The cubic root of 18303118 is about 263.5370578963.

Adding to 18303118 its reverse (81130381), we get a palindrome (99433499).

The spelling of 18303118 in words is "eighteen million, three hundred three thousand, one hundred eighteen".