18010216 has 16 divisors (see below), whose sum is σ = 38593440. Its totient is φ = 7718640.

The previous prime is 18010211. The next prime is 18010217. The reversal of 18010216 is 61201081.

It is a junction number, because it is equal to n+sod(n) for n = 18010193 and 18010202.

It is not an unprimeable number, because it can be changed into a prime (18010211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160750 + ... + 160861.

It is an arithmetic number, because the mean of its divisors is an integer number (2412090).

Almost surely, 2^18010216 is an apocalyptic number.

It is an amenable number.

18010216 is an abundant number, since it is smaller than the sum of its proper divisors (20583224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18010216 is a wasteful number, since it uses less digits than its factorization.

18010216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321624 (or 321620 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 18010216 is about 4243.8444834843. The cubic root of 18010216 is about 262.1237105885.

Adding to 18010216 its reverse (61201081), we get a palindrome (79211297).

The spelling of 18010216 in words is "eighteen million, ten thousand, two hundred sixteen".