18994366 has 16 divisors (see below), whose sum is σ = 30178944. Its totient is φ = 8947224.

The previous prime is 18994361. The next prime is 18994373. The reversal of 18994366 is 66349981.

18994366 is a nontrivial binomial coefficient, being equal to C(6164, 2).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18994361) 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 7 ways as a sum of consecutive naturals, for example, 1 + ... + 6163.

It is an arithmetic number, because the mean of its divisors is an integer number (1886184).

Almost surely, 2^18994366 is an apocalyptic number.

18994366 is the 6163-rd triangular number and also the 3082-nd hexagonal number.

18994366 is the 2055-th centered nonagonal number.

18994366 is a deficient number, since it is larger than the sum of its proper divisors (11184578).

18994366 is a wasteful number, since it uses less digits than its factorization.

18994366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6255.

The product of its digits is 279936, while the sum is 46.

The square root of 18994366 is about 4358.2526315027. The cubic root of 18994366 is about 266.8137872211.

The spelling of 18994366 in words is "eighteen million, nine hundred ninety-four thousand, three hundred sixty-six".