20963256959880 has 1152 divisors, whose sum is σ = 75222382959360. Its totient is φ = 5248464076800.

The previous prime is 20963256959867. The next prime is 20963256959959. The reversal of 20963256959880 is 8895965236902.

20963256959880 is a `hidden beast` number, since 2 + 0 + 9 + 6 + 3 + 2 + 569 + 59 + 8 + 8 + 0 = 666.

It is a super-2 number, since 2×20963256959880² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 20963256959799 and 20963256959808.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 48413988144 + ... + 48413988576.

It is an arithmetic number, because the mean of its divisors is an integer number (65297207430).

Almost surely, 2^{20963256959880} is an apocalyptic number.

20963256959880 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 20963256959880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37611191479680).

20963256959880 is an abundant number, since it is smaller than the sum of its proper divisors (54259125999480).

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

20963256959880 is a wasteful number, since it uses less digits than its factorization.

20963256959880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 503884800, while the sum is 72.

The spelling of 20963256959880 in words is "twenty trillion, nine hundred sixty-three billion, two hundred fifty-six million, nine hundred fifty-nine thousand, eight hundred eighty".