20317188852 has 240 divisors, whose sum is σ = 58147024320. Its totient is φ = 6160831488.

The previous prime is 20317188839. The next prime is 20317188901. The reversal of 20317188852 is 25888171302.

It is a junction number, because it is equal to n+sod(n) for n = 20317188798 and 20317188807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25815603 + ... + 25816389.

It is an arithmetic number, because the mean of its divisors is an integer number (242279268).

Almost surely, 2^20317188852 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 20317188852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29073512160).

20317188852 is an abundant number, since it is smaller than the sum of its proper divisors (37829835468).

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

20317188852 is a wasteful number, since it uses less digits than its factorization.

20317188852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 20317188852 in words is "twenty billion, three hundred seventeen million, one hundred eighty-eight thousand, eight hundred fifty-two".