12420681236 has 48 divisors (see below), whose sum is σ = 23766684480. Its totient is φ = 5656573440.

The previous prime is 12420681209. The next prime is 12420681257. The reversal of 12420681236 is 63218602421.

It is a junction number, because it is equal to n+sod(n) for n = 12420681196 and 12420681205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299231 + ... + 338201.

It is an arithmetic number, because the mean of its divisors is an integer number (495139260).

Almost surely, 2^12420681236 is an apocalyptic number.

It is an amenable number.

12420681236 is a deficient number, since it is larger than the sum of its proper divisors (11346003244).

12420681236 is a wasteful number, since it uses less digits than its factorization.

12420681236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39144 (or 39142 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 12420681236 in words is "twelve billion, four hundred twenty million, six hundred eighty-one thousand, two hundred thirty-six".