18272066 has 8 divisors (see below), whose sum is σ = 27502524. Its totient is φ = 9104560.

The previous prime is 18272041. The next prime is 18272071. The reversal of 18272066 is 66027281.

It can be written as a sum of positive squares in 2 ways, for example, as 18241441 + 30625 = 4271^2 + 175^2 .

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

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, 15005 + ... + 16176.

Almost surely, 2^18272066 is an apocalyptic number.

18272066 is a deficient number, since it is larger than the sum of its proper divisors (9230458).

18272066 is a wasteful number, since it uses less digits than its factorization.

18272066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31476.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18272066 is about 4274.5837224226. The cubic root of 18272066 is about 263.3879396807.

The spelling of 18272066 in words is "eighteen million, two hundred seventy-two thousand, sixty-six".