18369312 has 96 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 5498880.

The previous prime is 18369293. The next prime is 18369319. The reversal of 18369312 is 21396381.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (18369319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50989 + ... + 51347.

It is an arithmetic number, because the mean of its divisors is an integer number (555660).

Almost surely, 2^18369312 is an apocalyptic number.

18369312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18369312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26671680).

18369312 is an abundant number, since it is smaller than the sum of its proper divisors (34974048).

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

18369312 is a wasteful number, since it uses less digits than its factorization.

18369312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 418 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 18369312 is about 4285.9435367256. The cubic root of 18369312 is about 263.8543733119.

It can be divided in two parts, 18369 and 312, that added together give a palindrome (18681).

The spelling of 18369312 in words is "eighteen million, three hundred sixty-nine thousand, three hundred twelve".