18454216 has 16 divisors (see below), whose sum is σ = 37747440. Its totient is φ = 8388240.

The previous prime is 18454213. The next prime is 18454253. The reversal of 18454216 is 61245481.

It is not an unprimeable number, because it can be changed into a prime (18454213) by changing a digit.

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, 104766 + ... + 104941.

It is an arithmetic number, because the mean of its divisors is an integer number (2359215).

Almost surely, 2^18454216 is an apocalyptic number.

It is an amenable number.

18454216 is an abundant number, since it is smaller than the sum of its proper divisors (19293224).

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

18454216 is a wasteful number, since it uses less digits than its factorization.

18454216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209724 (or 209720 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 18454216 is about 4295.8370546379. The cubic root of 18454216 is about 264.2602652179.

Adding to 18454216 its reverse (61245481), we get a palindrome (79699697).

The spelling of 18454216 in words is "eighteen million, four hundred fifty-four thousand, two hundred sixteen".