20756220823884 has 192 divisors, whose sum is σ = 61010817480704. Its totient is φ = 5346758191104.

The previous prime is 20756220823861. The next prime is 20756220823889. The reversal of 20756220823884 is 48832802265702.

It is not an unprimeable number, because it can be changed into a prime (20756220823889) 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, 6946782 + ... + 9474714.

Almost surely, 2^{20756220823884} 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 20756220823884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30505408740352).

20756220823884 is an abundant number, since it is smaller than the sum of its proper divisors (40254596656820).

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

20756220823884 is a wasteful number, since it uses less digits than its factorization.

20756220823884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528136 (or 2528134 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 57.

The spelling of 20756220823884 in words is "twenty trillion, seven hundred fifty-six billion, two hundred twenty million, eight hundred twenty-three thousand, eight hundred eighty-four".