18966196 has 12 divisors (see below), whose sum is σ = 33237540. Its totient is φ = 9469760.

The previous prime is 18966187. The next prime is 18966197. The reversal of 18966196 is 69166981.

It can be written as a sum of positive squares in 2 ways, for example, as 13032100 + 5934096 = 3610^2 + 2436^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18966197) 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 3 ways as a sum of consecutive naturals, for example, 306 + ... + 6166.

It is an arithmetic number, because the mean of its divisors is an integer number (2769795).

Almost surely, 2^18966196 is an apocalyptic number.

It is an amenable number.

18966196 is a deficient number, since it is larger than the sum of its proper divisors (14271344).

18966196 is a wasteful number, since it uses less digits than its factorization.

18966196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674 (or 6672 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 18966196 is about 4355.0196325619. The cubic root of 18966196 is about 266.6818206666.

The spelling of 18966196 in words is "eighteen million, nine hundred sixty-six thousand, one hundred ninety-six".