18360216 has 64 divisors (see below), whose sum is σ = 58291200. Its totient is φ = 5245344.

The previous prime is 18360197. The next prime is 18360253. The reversal of 18360216 is 61206381.

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 18360216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4560 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (910800).

Almost surely, 2^18360216 is an apocalyptic number.

It is an amenable number.

18360216 is an abundant number, since it is smaller than the sum of its proper divisors (39930984).

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

18360216 is a wasteful number, since it uses less digits than its factorization.

18360216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165 (or 12155 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18360216 is about 4284.8822620931. The cubic root of 18360216 is about 263.8108148736.

Adding to 18360216 its reverse (61206381), we get a palindrome (79566597).

The spelling of 18360216 in words is "eighteen million, three hundred sixty thousand, two hundred sixteen".