20888688708 has 72 divisors (see below), whose sum is σ = 54627955200. Its totient is φ = 6723118080.

The previous prime is 20888688703. The next prime is 20888688727. The reversal of 20888688708 is 80788688802.

It is not an unprimeable number, because it can be changed into a prime (20888688701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480241 + ... + 521927.

It is an arithmetic number, because the mean of its divisors is an integer number (758721600).

Almost surely, 2^20888688708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20888688708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27313977600).

20888688708 is an abundant number, since it is smaller than the sum of its proper divisors (33739266492).

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

20888688708 is a wasteful number, since it uses less digits than its factorization.

20888688708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42177 (or 42172 counting only the distinct ones).

The product of its (nonzero) digits is 22020096, while the sum is 63.

The spelling of 20888688708 in words is "twenty billion, eight hundred eighty-eight million, six hundred eighty-eight thousand, seven hundred eight".