129364931820 has 24 divisors (see below), whose sum is σ = 362221809264. Its totient is φ = 34497315136.

The previous prime is 129364931789. The next prime is 129364931849. The reversal of 129364931820 is 28139463921.

It is a self number, because there is not a number n which added to its sum of digits gives 129364931820.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078041039 + ... + 1078041158.

It is an arithmetic number, because the mean of its divisors is an integer number (15092575386).

Almost surely, 2^129364931820 is an apocalyptic number.

129364931820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129364931820 is an abundant number, since it is smaller than the sum of its proper divisors (232856877444).

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

129364931820 is a wasteful number, since it uses less digits than its factorization.

129364931820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156082209 (or 2156082207 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 129364931820 in words is "one hundred twenty-nine billion, three hundred sixty-four million, nine hundred thirty-one thousand, eight hundred twenty".