20710591008 has 24 divisors (see below), whose sum is σ = 54365301648. Its totient is φ = 6903530304.

The previous prime is 20710591007. The next prime is 20710591039. The reversal of 20710591008 is 80019501702.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20710591008.

It is not an unprimeable number, because it can be changed into a prime (20710591007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107867566 + ... + 107867757.

It is an arithmetic number, because the mean of its divisors is an integer number (2265220902).

Almost surely, 2^20710591008 is an apocalyptic number.

It is an amenable number.

20710591008 is an abundant number, since it is smaller than the sum of its proper divisors (33654710640).

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

20710591008 is a wasteful number, since it uses less digits than its factorization.

20710591008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215735336 (or 215735328 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The spelling of 20710591008 in words is "twenty billion, seven hundred ten million, five hundred ninety-one thousand, eight".