1994118818 has 16 divisors (see below), whose sum is σ = 3149808000. Its totient is φ = 944222832.

The previous prime is 1994118817. The next prime is 1994118823. The reversal of 1994118818 is 8188114991.

It is not an unprimeable number, because it can be changed into a prime (1994118817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109703 + ... + 126581.

It is an arithmetic number, because the mean of its divisors is an integer number (196863000).

Almost surely, 2^1994118818 is an apocalyptic number.

1994118818 is a deficient number, since it is larger than the sum of its proper divisors (1155689182).

1994118818 is a wasteful number, since it uses less digits than its factorization.

1994118818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009.

The product of its digits is 165888, while the sum is 50.

The square root of 1994118818 is about 44655.5575264714. The cubic root of 1994118818 is about 1258.6848665654.

The spelling of 1994118818 in words is "one billion, nine hundred ninety-four million, one hundred eighteen thousand, eight hundred eighteen".