11973818 has 8 divisors (see below), whose sum is σ = 17975412. Its totient is φ = 5982016.

The previous prime is 11973799. The next prime is 11973821. The reversal of 11973818 is 81837911.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 1129969 = 3293^2 + 1063^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3596 + ... + 6072.

Almost surely, 2^11973818 is an apocalyptic number.

11973818 is a deficient number, since it is larger than the sum of its proper divisors (6001594).

11973818 is a wasteful number, since it uses less digits than its factorization.

11973818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its digits is 12096, while the sum is 38.

The square root of 11973818 is about 3460.3205053867. The cubic root of 11973818 is about 228.7762222221.

It can be divided in two parts, 119 and 73818, that added together give a palindrome (73937).

The spelling of 11973818 in words is "eleven million, nine hundred seventy-three thousand, eight hundred eighteen".