11918 has 8 divisors (see below), whose sum is σ = 18360. Its totient is φ = 5800.

The previous prime is 11909. The next prime is 11923. The reversal of 11918 is 81911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 11918.

It is a congruent number.

It is an unprimeable number.

11918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 168.

It is an arithmetic number, because the mean of its divisors is an integer number (2295).

2¹¹⁹¹⁸ is an apocalyptic number.

11918 is a deficient number, since it is larger than the sum of its proper divisors (6442).

11918 is a wasteful number, since it uses less digits than its factorization.

11918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162.

The product of its digits is 72, while the sum is 20.

The square root of 11918 is about 109.1695928361. The cubic root of 11918 is about 22.8420175230.

It can be divided in two parts, 11 and 918, that added together give a palindrome (929).

The spelling of 11918 in words is "eleven thousand, nine hundred eighteen".