11518813 has 4 divisors (see below), whose sum is σ = 11707708. Its totient is φ = 11329920.

The previous prime is 11518811. The next prime is 11518817. The reversal of 11518813 is 31881511.

11518813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5555449 + 5963364 = 2357^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 11518813 - 2¹ = 11518811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11518811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94356 + ... + 94477.

It is an arithmetic number, because the mean of its divisors is an integer number (2926927).

Almost surely, 2^11518813 is an apocalyptic number.

It is an amenable number.

11518813 is a deficient number, since it is larger than the sum of its proper divisors (188895).

11518813 is an equidigital number, since it uses as much as digits as its factorization.

11518813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188894.

The product of its digits is 960, while the sum is 28.

The square root of 11518813 is about 3393.9376835764. The cubic root of 11518813 is about 225.8408896527.

The spelling of 11518813 in words is "eleven million, five hundred eighteen thousand, eight hundred thirteen".