20729142708 has 24 divisors (see below), whose sum is σ = 48401374560. Its totient is φ = 6904946400.

The previous prime is 20729142677. The next prime is 20729142719. The reversal of 20729142708 is 80724192702.

It is a self number, because there is not a number n which added to its sum of digits gives 20729142708.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 577843 + ... + 612666.

It is an arithmetic number, because the mean of its divisors is an integer number (2016723940).

Almost surely, 2^20729142708 is an apocalyptic number.

It is an amenable number.

20729142708 is an abundant number, since it is smaller than the sum of its proper divisors (27672231852).

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

20729142708 is a wasteful number, since it uses less digits than its factorization.

20729142708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191967 (or 1191965 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 20729142708 in words is "twenty billion, seven hundred twenty-nine million, one hundred forty-two thousand, seven hundred eight".