18026216 has 48 divisors (see below), whose sum is σ = 37332000. Its totient is φ = 8154432.

The previous prime is 18026213. The next prime is 18026219. The reversal of 18026216 is 61262081.

It is an interprime number because it is at equal distance from previous prime (18026213) and next prime (18026219).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (18026213) 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 11 ways as a sum of consecutive naturals, for example, 90485 + ... + 90683.

It is an arithmetic number, because the mean of its divisors is an integer number (777750).

Almost surely, 2^18026216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18026216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18666000).

18026216 is an abundant number, since it is smaller than the sum of its proper divisors (19305784).

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

18026216 is a wasteful number, since it uses less digits than its factorization.

18026216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18026216 is about 4245.7291482147. The cubic root of 18026216 is about 262.2013098434.

Adding to 18026216 its reverse (61262081), we get a palindrome (79288297).

The spelling of 18026216 in words is "eighteen million, twenty-six thousand, two hundred sixteen".