1118621218 has 16 divisors (see below), whose sum is σ = 1971277056. Its totient is φ = 469351440.

The previous prime is 1118621201. The next prime is 1118621249. The reversal of 1118621218 is 8121268111.

It is a self number, because there is not a number n which added to its sum of digits gives 1118621218.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1955346 + ... + 1955917.

It is an arithmetic number, because the mean of its divisors is an integer number (123204816).

Almost surely, 2^1118621218 is an apocalyptic number.

1118621218 is a deficient number, since it is larger than the sum of its proper divisors (852655838).

1118621218 is a wasteful number, since it uses less digits than its factorization.

1118621218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911289.

The product of its digits is 1536, while the sum is 31.

The square root of 1118621218 is about 33445.7952215222. The cubic root of 1118621218 is about 1038.0724955338.

Adding to 1118621218 its reverse (8121268111), we get a palindrome (9239889329).

The spelling of 1118621218 in words is "one billion, one hundred eighteen million, six hundred twenty-one thousand, two hundred eighteen".