20688422260 has 96 divisors (see below), whose sum is σ = 51051700224. Its totient is φ = 6963792000.

The previous prime is 20688422159. The next prime is 20688422267. The reversal of 20688422260 is 6222488602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20688422267) 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 31 ways as a sum of consecutive naturals, for example, 90915 + ... + 222805.

It is an arithmetic number, because the mean of its divisors is an integer number (531788544).

Almost surely, 2^20688422260 is an apocalyptic number.

20688422260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20688422260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25525850112).

20688422260 is an abundant number, since it is smaller than the sum of its proper divisors (30363277964).

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

20688422260 is a wasteful number, since it uses less digits than its factorization.

20688422260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131965 (or 131963 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 20688422260 in words is "twenty billion, six hundred eighty-eight million, four hundred twenty-two thousand, two hundred sixty".