118217918 has 32 divisors (see below), whose sum is σ = 218877120. Its totient is φ = 46632960.

The previous prime is 118217857. The next prime is 118217921. The reversal of 118217918 is 819712811.

It is a super-2 number, since 2×118217918² = 27950952272509448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 83198 + ... + 84606.

It is an arithmetic number, because the mean of its divisors is an integer number (6839910).

Almost surely, 2^118217918 is an apocalyptic number.

118217918 is a deficient number, since it is larger than the sum of its proper divisors (100659202).

118217918 is a wasteful number, since it uses less digits than its factorization.

118217918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892.

The product of its digits is 8064, while the sum is 38.

The square root of 118217918 is about 10872.8063534674. The cubic root of 118217918 is about 490.7885650596.

The spelling of 118217918 in words is "one hundred eighteen million, two hundred seventeen thousand, nine hundred eighteen".