20868804608 has 52 divisors (see below), whose sum is σ = 43171812240. Its totient is φ = 10074537984.

The previous prime is 20868804581. The next prime is 20868804647. The reversal of 20868804608 is 80640886802.

It is a congruent number.

It is an unprimeable number.

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, 30941 + ... + 206627.

Almost surely, 2^20868804608 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 20868804608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21585906120).

20868804608 is an abundant number, since it is smaller than the sum of its proper divisors (22303007632).

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

20868804608 is an equidigital number, since it uses as much as digits as its factorization.

20868804608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175740 (or 175718 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 50.

The spelling of 20868804608 in words is "twenty billion, eight hundred sixty-eight million, eight hundred four thousand, six hundred eight".