129417428020 has 24 divisors (see below), whose sum is σ = 286080631200. Its totient is φ = 49042393632.

The previous prime is 129417428017. The next prime is 129417428059. The reversal of 129417428020 is 20824714921.

It is a super-2 number, since 2×129417428020² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 170285710 + ... + 170286469.

It is an arithmetic number, because the mean of its divisors is an integer number (11920026300).

Almost surely, 2^129417428020 is an apocalyptic number.

129417428020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129417428020 is an abundant number, since it is smaller than the sum of its proper divisors (156663203180).

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

129417428020 is a wasteful number, since it uses less digits than its factorization.

129417428020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340572207 (or 340572205 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 129417428020 in words is "one hundred twenty-nine billion, four hundred seventeen million, four hundred twenty-eight thousand, twenty".