18083216 has 20 divisors (see below), whose sum is σ = 35106012. Its totient is φ = 9023616.

The previous prime is 18083207. The next prime is 18083237. The reversal of 18083216 is 61238081.

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 4393216 = 3700^2 + 2096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11366 + ... + 12858.

Almost surely, 2^18083216 is an apocalyptic number.

18083216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18083216 is a deficient number, since it is larger than the sum of its proper divisors (17022796).

18083216 is a wasteful number, since it uses less digits than its factorization.

18083216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258 (or 2252 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18083216 is about 4252.4364780676. The cubic root of 18083216 is about 262.4773845974.

The spelling of 18083216 in words is "eighteen million, eighty-three thousand, two hundred sixteen".