12240018 has 32 divisors (see below), whose sum is σ = 31086720. Its totient is φ = 3497040.

The previous prime is 12240013. The next prime is 12240037. The reversal of 12240018 is 81004221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12240013) 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 15 ways as a sum of consecutive naturals, for example, 15813 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (971460).

Almost surely, 2^12240018 is an apocalyptic number.

12240018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12240018 is an abundant number, since it is smaller than the sum of its proper divisors (18846702).

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

12240018 is a wasteful number, since it uses less digits than its factorization.

12240018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32399 (or 32393 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12240018 is about 3498.5737093850. The cubic root of 12240018 is about 230.4591834723.

Adding to 12240018 its reverse (81004221), we get a palindrome (93244239).

The spelling of 12240018 in words is "twelve million, two hundred forty thousand, eighteen".