18000208 has 10 divisors (see below), whose sum is σ = 34875434. Its totient is φ = 9000096.

The previous prime is 18000149. The next prime is 18000209. The reversal of 18000208 is 80200081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9659664 + 8340544 = 3108^2 + 2888^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562491 + ... + 562522.

Almost surely, 2^18000208 is an apocalyptic number.

It is an amenable number.

18000208 is a deficient number, since it is larger than the sum of its proper divisors (16875226).

18000208 is a wasteful number, since it uses less digits than its factorization.

18000208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125021 (or 1125015 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 18000208 is about 4242.6652000836. The cubic root of 18000208 is about 262.0751488878.

Adding to 18000208 its reverse (80200081), we get a palindrome (98200289).

The spelling of 18000208 in words is "eighteen million, two hundred eight", and thus it is an aban number.