168500018 has 16 divisors (see below), whose sum is σ = 266760000. Its totient is φ = 79603632.

The previous prime is 168499993. The next prime is 168500021. The reversal of 168500018 is 810005861.

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, 9083 + ... + 20481.

It is an arithmetic number, because the mean of its divisors is an integer number (16672500).

Almost surely, 2^168500018 is an apocalyptic number.

168500018 is a deficient number, since it is larger than the sum of its proper divisors (98259982).

168500018 is a wasteful number, since it uses less digits than its factorization.

168500018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11809.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 168500018 is about 12980.7556790812. The cubic root of 168500018 is about 552.3317183694.

Adding to 168500018 its reverse (810005861), we get a palindrome (978505879).

The spelling of 168500018 in words is "one hundred sixty-eight million, five hundred thousand, eighteen".