18448216 has 8 divisors (see below), whose sum is σ = 34590420. Its totient is φ = 9224104.

The previous prime is 18448211. The next prime is 18448223. The reversal of 18448216 is 61284481.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1153006 + ... + 1153021.

Almost surely, 2^18448216 is an apocalyptic number.

It is an amenable number.

18448216 is a deficient number, since it is larger than the sum of its proper divisors (16142204).

18448216 is a wasteful number, since it uses less digits than its factorization.

18448216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306033 (or 2306029 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 18448216 is about 4295.1386473547. The cubic root of 18448216 is about 264.2316225587.

It can be divided in two parts, 184 and 48216, that added together give a square (48400 = 220²).

The spelling of 18448216 in words is "eighteen million, four hundred forty-eight thousand, two hundred sixteen".