12020418 has 12 divisors (see below), whose sum is σ = 26044278. Its totient is φ = 4006800.

The previous prime is 12020417. The next prime is 12020431. The reversal of 12020418 is 81402021.

It can be written as a sum of positive squares in only one way, i.e., 11309769 + 710649 = 3363^2 + 843^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 667801 = 12020418 / (1 + 2 + 0 + 2 + 0 + 4 + 1 + 8).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12020418.

It is not an unprimeable number, because it can be changed into a prime (12020417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333883 + ... + 333918.

Almost surely, 2^12020418 is an apocalyptic number.

12020418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12020418 is an abundant number, since it is smaller than the sum of its proper divisors (14023860).

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

12020418 is a wasteful number, since it uses less digits than its factorization.

12020418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667809 (or 667806 counting only the distinct ones).

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

The square root of 12020418 is about 3467.0474470362. The cubic root of 12020418 is about 229.0726236866.

Adding to 12020418 its reverse (81402021), we get a palindrome (93422439).

The spelling of 12020418 in words is "twelve million, twenty thousand, four hundred eighteen".