517320018 has 24 divisors (see below), whose sum is σ = 1121293056. Its totient is φ = 172373400.

The previous prime is 517320017. The next prime is 517320031. The reversal of 517320018 is 810023715.

It is a junction number, because it is equal to n+sod(n) for n = 517319973 and 517320000.

It is not an unprimeable number, because it can be changed into a prime (517320017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70503 + ... + 77493.

It is an arithmetic number, because the mean of its divisors is an integer number (46720544).

Almost surely, 2^517320018 is an apocalyptic number.

517320018 is an abundant number, since it is smaller than the sum of its proper divisors (603973038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517320018 is a wasteful number, since it uses less digits than its factorization.

517320018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110 (or 11107 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 517320018 is about 22744.6701009269. The cubic root of 517320018 is about 802.7613007651.

The spelling of 517320018 in words is "five hundred seventeen million, three hundred twenty thousand, eighteen".