18422316 has 72 divisors (see below), whose sum is σ = 52713024. Its totient is φ = 5579280.

The previous prime is 18422311. The next prime is 18422321. The reversal of 18422316 is 61322481.

It is an interprime number because it is at equal distance from previous prime (18422311) and next prime (18422321).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 18422316.

It is not an unprimeable number, because it can be changed into a prime (18422311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9831 + ... + 11553.

Almost surely, 2^18422316 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 18422316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26356512).

18422316 is an abundant number, since it is smaller than the sum of its proper divisors (34290708).

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

18422316 is a wasteful number, since it uses less digits than its factorization.

18422316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1739 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 18422316 is about 4292.1225518384. The cubic root of 18422316 is about 264.1079104309.

Adding to 18422316 its reverse (61322481), we get a palindrome (79744797).

It can be divided in two parts, 184 and 22316, that added together give a square (22500 = 150²).

The spelling of 18422316 in words is "eighteen million, four hundred twenty-two thousand, three hundred sixteen".