18067018 has 4 divisors (see below), whose sum is σ = 27100530. Its totient is φ = 9033508.

The previous prime is 18067013. The next prime is 18067031. The reversal of 18067018 is 81076081.

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

It can be written as a sum of positive squares in only one way, i.e., 17833729 + 233289 = 4223^2 + 483^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18067013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4516753 + ... + 4516756.

Almost surely, 2^18067018 is an apocalyptic number.

18067018 is a deficient number, since it is larger than the sum of its proper divisors (9033512).

18067018 is an equidigital number, since it uses as much as digits as its factorization.

18067018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9033511.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 18067018 is about 4250.5314961779. The cubic root of 18067018 is about 262.3989900101.

The spelling of 18067018 in words is "eighteen million, sixty-seven thousand, eighteen".