12943851840 has 336 divisors, whose sum is σ = 48605968320. Its totient is φ = 3269652480.

The previous prime is 12943851829. The next prime is 12943851853. The reversal of 12943851840 is 4815834921.

12943851840 is a `hidden beast` number, since 1 + 2 + 94 + 3 + 8 + 518 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1473060 + ... + 1481820.

It is an arithmetic number, because the mean of its divisors is an integer number (144660620).

Almost surely, 2^12943851840 is an apocalyptic number.

12943851840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12943851840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24302984160).

12943851840 is an abundant number, since it is smaller than the sum of its proper divisors (35662116480).

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

12943851840 is an equidigital number, since it uses as much as digits as its factorization.

12943851840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8812 (or 8790 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 12943851840 in words is "twelve billion, nine hundred forty-three million, eight hundred fifty-one thousand, eight hundred forty".