18066371 has 4 divisors (see below), whose sum is σ = 18095112. Its totient is φ = 18037632.

The previous prime is 18066337. The next prime is 18066379. The reversal of 18066371 is 17366081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18066371 - 2¹⁴ = 18049987 is a prime.

It is a super-2 number, since 2×18066371² = 652787522219282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18066379) 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 3 ways as a sum of consecutive naturals, for example, 13406 + ... + 14691.

It is an arithmetic number, because the mean of its divisors is an integer number (4523778).

Almost surely, 2^18066371 is an apocalyptic number.

18066371 is a deficient number, since it is larger than the sum of its proper divisors (28741).

18066371 is an equidigital number, since it uses as much as digits as its factorization.

18066371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28740.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18066371 is about 4250.4553873673. The cubic root of 18066371 is about 262.3958577062.

The spelling of 18066371 in words is "eighteen million, sixty-six thousand, three hundred seventy-one".