18000518 has 16 divisors (see below), whose sum is σ = 28692144. Its totient is φ = 8440320.

The previous prime is 18000473. The next prime is 18000527. The reversal of 18000518 is 81500081.

18000518 is a modest number, since divided by 518 gives 18 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 18000493 and 18000502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10673 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (1793259).

Almost surely, 2^18000518 is an apocalyptic number.

18000518 is a deficient number, since it is larger than the sum of its proper divisors (10691626).

18000518 is a wasteful number, since it uses less digits than its factorization.

18000518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 18000518 is about 4242.7017335655. The cubic root of 18000518 is about 262.0766533672.

Adding to 18000518 its reverse (81500081), we get a palindrome (99500599).

The spelling of 18000518 in words is "eighteen million, five hundred eighteen", and thus it is an aban number.