18826866 has 36 divisors (see below), whose sum is σ = 41587182. Its totient is φ = 6155424.

The previous prime is 18826849. The next prime is 18826867. The reversal of 18826866 is 66862881.

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 1010025 = 4221^2 + 1005^2 .

It is not an unprimeable number, because it can be changed into a prime (18826867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 80686 + ... + 80918.

Almost surely, 2^18826866 is an apocalyptic number.

18826866 is an abundant number, since it is smaller than the sum of its proper divisors (22760316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18826866 is a wasteful number, since it uses less digits than its factorization.

18826866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 305 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 18826866 is about 4338.9936621295. The cubic root of 18826866 is about 266.0271798409.

The spelling of 18826866 in words is "eighteen million, eight hundred twenty-six thousand, eight hundred sixty-six".