18141312 has 128 divisors (see below), whose sum is σ = 58458240. Its totient is φ = 4866048.

The previous prime is 18141283. The next prime is 18141349. The reversal of 18141312 is 21314181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45498 + ... + 45894.

It is an arithmetic number, because the mean of its divisors is an integer number (456705).

Almost surely, 2^18141312 is an apocalyptic number.

18141312 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 18141312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29229120).

18141312 is an abundant number, since it is smaller than the sum of its proper divisors (40316928).

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

18141312 is a wasteful number, since it uses less digits than its factorization.

18141312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 426 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 18141312 is about 4259.2619078897. The cubic root of 18141312 is about 262.7581713994.

Adding to 18141312 its reverse (21314181), we get a palindrome (39455493).

The spelling of 18141312 in words is "eighteen million, one hundred forty-one thousand, three hundred twelve".