18059866 has 16 divisors (see below), whose sum is σ = 30572640. Its totient is φ = 7925680.

The previous prime is 18059857. The next prime is 18059869. The reversal of 18059866 is 66895081.

It is not an unprimeable number, because it can be changed into a prime (18059869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13516 + ... + 14791.

It is an arithmetic number, because the mean of its divisors is an integer number (1910790).

Almost surely, 2^18059866 is an apocalyptic number.

18059866 is a deficient number, since it is larger than the sum of its proper divisors (12512774).

18059866 is a wasteful number, since it uses less digits than its factorization.

18059866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28349.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 18059866 is about 4249.6901063489. The cubic root of 18059866 is about 262.3643610661.

The spelling of 18059866 in words is "eighteen million, fifty-nine thousand, eight hundred sixty-six".