18127312 has 80 divisors (see below), whose sum is σ = 43425792. Its totient is φ = 7159680.

The previous prime is 18127301. The next prime is 18127313. The reversal of 18127312 is 21372181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18127313) 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, 79743 + ... + 79969.

Almost surely, 2^18127312 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 18127312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21712896).

18127312 is an abundant number, since it is smaller than the sum of its proper divisors (25298480).

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

18127312 is a wasteful number, since it uses less digits than its factorization.

18127312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 290 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 18127312 is about 4257.6181134526. The cubic root of 18127312 is about 262.6905621568.

Adding to 18127312 its reverse (21372181), we get a palindrome (39499493).

The spelling of 18127312 in words is "eighteen million, one hundred twenty-seven thousand, three hundred twelve".