18036312 has 80 divisors (see below), whose sum is σ = 52770840. Its totient is φ = 5136768.

The previous prime is 18036311. The next prime is 18036323. The reversal of 18036312 is 21363081.

It is a super-2 number, since 2×18036312² = 650617101122688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57468 + ... + 57780.

Almost surely, 2^18036312 is an apocalyptic number.

18036312 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 18036312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26385420).

18036312 is an abundant number, since it is smaller than the sum of its proper divisors (34734528).

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

18036312 is an equidigital number, since it uses as much as digits as its factorization.

18036312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 18036312 is about 4246.9179412840. The cubic root of 18036312 is about 262.2502513475.

Adding to 18036312 its reverse (21363081), we get a palindrome (39399393).

The spelling of 18036312 in words is "eighteen million, thirty-six thousand, three hundred twelve".