12709820340 has 144 divisors (see below), whose sum is σ = 44175680640. Its totient is φ = 2897521920.

The previous prime is 12709820327. The next prime is 12709820341. The reversal of 12709820340 is 4302890721.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12709820295 and 12709820304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12709820341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 477175 + ... + 503105.

It is an arithmetic number, because the mean of its divisors is an integer number (306775560).

Almost surely, 2^12709820340 is an apocalyptic number.

12709820340 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 12709820340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22087840320).

12709820340 is an abundant number, since it is smaller than the sum of its proper divisors (31465860300).

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

12709820340 is a wasteful number, since it uses less digits than its factorization.

12709820340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26342 (or 26337 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 12709820340 in words is "twelve billion, seven hundred nine million, eight hundred twenty thousand, three hundred forty".