18068644 has 12 divisors (see below), whose sum is σ = 34494768. Its totient is φ = 8213000.

The previous prime is 18068621. The next prime is 18068647. The reversal of 18068644 is 44686081.

It is not an unprimeable number, because it can be changed into a prime (18068647) 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 3 ways as a sum of consecutive naturals, for example, 205282 + ... + 205369.

It is an arithmetic number, because the mean of its divisors is an integer number (2874564).

Almost surely, 2^18068644 is an apocalyptic number.

It is an amenable number.

18068644 is a deficient number, since it is larger than the sum of its proper divisors (16426124).

18068644 is a wasteful number, since it uses less digits than its factorization.

18068644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410666 (or 410664 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 18068644 is about 4250.7227620724. The cubic root of 18068644 is about 262.4068615906.

The spelling of 18068644 in words is "eighteen million, sixty-eight thousand, six hundred forty-four".