18966033 has 24 divisors (see below), whose sum is σ = 29290248. Its totient is φ = 11784192.

The previous prime is 18966019. The next prime is 18966037. The reversal of 18966033 is 33066981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 199809 + 18766224 = 447^2 + 4332^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18966033 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18966037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16741 + ... + 17837.

It is an arithmetic number, because the mean of its divisors is an integer number (1220427).

Almost surely, 2^18966033 is an apocalyptic number.

It is an amenable number.

18966033 is a deficient number, since it is larger than the sum of its proper divisors (10324215).

18966033 is a wasteful number, since it uses less digits than its factorization.

18966033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 18966033 is about 4355.0009184844. Note that the first 3 decimals coincide. The cubic root of 18966033 is about 266.6810566887.

The spelling of 18966033 in words is "eighteen million, nine hundred sixty-six thousand, thirty-three".