12420494388 has 36 divisors (see below), whose sum is σ = 31399788420. Its totient is φ = 4139698176.

The previous prime is 12420494329. The next prime is 12420494393. The reversal of 12420494388 is 88349402421.

12420494388 is a `hidden beast` number, since 1 + 2 + 4 + 204 + 9 + 438 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6011211024 + 6409283364 = 77532^2 + 80058^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480498 + ... + 505686.

It is an arithmetic number, because the mean of its divisors is an integer number (872216345).

Almost surely, 2^12420494388 is an apocalyptic number.

12420494388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12420494388 is an abundant number, since it is smaller than the sum of its proper divisors (18979294032).

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

12420494388 is a wasteful number, since it uses less digits than its factorization.

12420494388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38896 (or 38891 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 12420494388 in words is "twelve billion, four hundred twenty million, four hundred ninety-four thousand, three hundred eighty-eight".