20711009288 has 108 divisors (see below), whose sum is σ = 42869644245. Its totient is φ = 9378385920.

The previous prime is 20711009287. The next prime is 20711009303. The reversal of 20711009288 is 88290011702.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 14 ways, for example, as 823804804 + 19887204484 = 28702^2 + 141022^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=101762.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20711009281) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 283712420 + ... + 283712492.

Almost surely, 2^20711009288 is an apocalyptic number.

It is an amenable number.

20711009288 is an abundant number, since it is smaller than the sum of its proper divisors (22158634957).

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

20711009288 is an equidigital number, since it uses as much as digits as its factorization.

20711009288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 20711009288 in words is "twenty billion, seven hundred eleven million, nine thousand, two hundred eighty-eight".