20317755360 has 384 divisors, whose sum is σ = 78617226240. Its totient is φ = 4304830464.

The previous prime is 20317755329. The next prime is 20317755361. The reversal of 20317755360 is 6355771302.

It is a super-2 number, since 2×20317755360² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20317755361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3824386 + ... + 3829694.

It is an arithmetic number, because the mean of its divisors is an integer number (204732360).

Almost surely, 2^20317755360 is an apocalyptic number.

20317755360 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 20317755360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39308613120).

20317755360 is an abundant number, since it is smaller than the sum of its proper divisors (58299470880).

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

20317755360 is a wasteful number, since it uses less digits than its factorization.

20317755360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5418 (or 5410 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 39.

The spelling of 20317755360 in words is "twenty billion, three hundred seventeen million, seven hundred fifty-five thousand, three hundred sixty".