12420420318 has 12 divisors (see below), whose sum is σ = 26910910728. Its totient is φ = 4140140100.

The previous prime is 12420420307. The next prime is 12420420319. The reversal of 12420420318 is 81302402421.

12420420318 is a `hidden beast` number, since 124 + 204 + 20 + 318 = 666.

It is a super-2 number, since 2×12420420318² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12420420291 and 12420420300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420420319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 345011658 + ... + 345011693.

It is an arithmetic number, because the mean of its divisors is an integer number (2242575894).

Almost surely, 2^12420420318 is an apocalyptic number.

12420420318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12420420318 is an abundant number, since it is smaller than the sum of its proper divisors (14490490410).

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

12420420318 is a wasteful number, since it uses less digits than its factorization.

12420420318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690023359 (or 690023356 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 12420420318 its reverse (81302402421), we get a palindrome (93722822739).

The spelling of 12420420318 in words is "twelve billion, four hundred twenty million, four hundred twenty thousand, three hundred eighteen".