18362216 has 16 divisors (see below), whose sum is σ = 35013600. Its totient is φ = 9025264.

The previous prime is 18362203. The next prime is 18362237. The reversal of 18362216 is 61226381.

It is an unprimeable number.

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, 18980 + ... + 19923.

It is an arithmetic number, because the mean of its divisors is an integer number (2188350).

Almost surely, 2^18362216 is an apocalyptic number.

It is an amenable number.

18362216 is a deficient number, since it is larger than the sum of its proper divisors (16651384).

18362216 is a wasteful number, since it uses less digits than its factorization.

18362216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38968 (or 38964 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 18362216 is about 4285.1156343791. The cubic root of 18362216 is about 263.8203936003.

Adding to 18362216 its reverse (61226381), we get a palindrome (79588597).

The spelling of 18362216 in words is "eighteen million, three hundred sixty-two thousand, two hundred sixteen".