11866918 has 36 divisors (see below), whose sum is σ = 22048740. Its totient is φ = 4775232.

The previous prime is 11866913. The next prime is 11866949. The reversal of 11866918 is 81966811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11866913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28113 + ... + 28531.

It is an arithmetic number, because the mean of its divisors is an integer number (612465).

Almost surely, 2^11866918 is an apocalyptic number.

11866918 is a deficient number, since it is larger than the sum of its proper divisors (10181822).

11866918 is a wasteful number, since it uses less digits than its factorization.

11866918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 445 counting only the distinct ones).

The product of its digits is 20736, while the sum is 40.

The square root of 11866918 is about 3444.8393286190. The cubic root of 11866918 is about 228.0933622979.

The spelling of 11866918 in words is "eleven million, eight hundred sixty-six thousand, nine hundred eighteen".