129684344020 has 192 divisors, whose sum is σ = 354718973952. Its totient is φ = 38617920000.

The previous prime is 129684343981. The next prime is 129684344063. The reversal of 129684344020 is 20443486921.

129684344020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40766830 + ... + 40770010.

It is an arithmetic number, because the mean of its divisors is an integer number (1847494656).

Almost surely, 2^129684344020 is an apocalyptic number.

129684344020 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 129684344020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177359486976).

129684344020 is an abundant number, since it is smaller than the sum of its proper divisors (225034629932).

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

129684344020 is a wasteful number, since it uses less digits than its factorization.

129684344020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382 (or 4380 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 129684344020 in words is "one hundred twenty-nine billion, six hundred eighty-four million, three hundred forty-four thousand, twenty".