673218018 has 24 divisors (see below), whose sum is σ = 1591243056. Its totient is φ = 204005400.

The previous prime is 673218017. The next prime is 673218023. The reversal of 673218018 is 810812376.

It is not an unprimeable number, because it can be changed into a prime (673218011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1699848 + ... + 1700243.

It is an arithmetic number, because the mean of its divisors is an integer number (66301794).

Almost surely, 2^673218018 is an apocalyptic number.

673218018 is an abundant number, since it is smaller than the sum of its proper divisors (918025038).

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

673218018 is a wasteful number, since it uses less digits than its factorization.

673218018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400110 (or 3400107 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 673218018 is about 25946.4451900448. The cubic root of 673218018 is about 876.4327082862.

The spelling of 673218018 in words is "six hundred seventy-three million, two hundred eighteen thousand, eighteen".