18966274 has 8 divisors (see below), whose sum is σ = 29218428. Its totient is φ = 9226800.

The previous prime is 18966263. The next prime is 18966281. The reversal of 18966274 is 47266981.

It can be written as a sum of positive squares in 2 ways, for example, as 18550249 + 416025 = 4307^2 + 645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18966274.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128077 + ... + 128224.

Almost surely, 2^18966274 is an apocalyptic number.

18966274 is a deficient number, since it is larger than the sum of its proper divisors (10252154).

18966274 is a wasteful number, since it uses less digits than its factorization.

18966274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256340.

The product of its digits is 145152, while the sum is 43.

The square root of 18966274 is about 4355.0285877363. The cubic root of 18966274 is about 266.6821862495.

The spelling of 18966274 in words is "eighteen million, nine hundred sixty-six thousand, two hundred seventy-four".