1113636818 has 18 divisors (see below), whose sum is σ = 1943759223. Its totient is φ = 477131340.

The previous prime is 1113636791. The next prime is 1113636829. The reversal of 1113636818 is 8186363111.

It can be written as a sum of positive squares in only one way, i.e., 556818409 + 556818409 = 23597^2 + 23597^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23597.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 328673 + ... + 332043.

Almost surely, 2^1113636818 is an apocalyptic number.

1113636818 is a deficient number, since it is larger than the sum of its proper divisors (830122405).

1113636818 is an frugal number, since it uses more digits than its factorization.

1113636818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758 (or 3380 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 1113636818 is about 33371.1974313179. The cubic root of 1113636818 is about 1036.5283706064.

Adding to 1113636818 its reverse (8186363111), we get a palindrome (9299999929).

The spelling of 1113636818 in words is "one billion, one hundred thirteen million, six hundred thirty-six thousand, eight hundred eighteen".