518018 has 4 divisors (see below), whose sum is σ = 777030. Its totient is φ = 259008.

The previous prime is 518017. The next prime is 518047. The reversal of 518018 is 810815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 466489 + 51529 = 683^2 + 227^2 .

It is a junction number, because it is equal to n+sod(n) for n = 517984 and 518002.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 518018.

It is not an unprimeable number, because it can be changed into a prime (518017) 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 as a sum of consecutive naturals, namely, 129503 + ... + 129506.

2⁵¹⁸⁰¹⁸ is an apocalyptic number.

518018 is a deficient number, since it is larger than the sum of its proper divisors (259012).

518018 is a wasteful number, since it uses less digits than its factorization.

518018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259011.

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

The square root of 518018 is about 719.7346733346. The cubic root of 518018 is about 80.3122174184.

The spelling of 518018 in words is "five hundred eighteen thousand, eighteen".