20868771113856 has 192 divisors, whose sum is σ = 60350156053200. Its totient is φ = 6921763061760.

The previous prime is 20868771113849. The next prime is 20868771113881. The reversal of 20868771113856 is 65831117786802.

20868771113856 is a `hidden beast` number, since 20 + 86 + 87 + 71 + 11 + 385 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 20868771113793 and 20868771113802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 460849936 + ... + 460895216.

Almost surely, 2^{20868771113856} 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 20868771113856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30175078026600).

20868771113856 is an abundant number, since it is smaller than the sum of its proper divisors (39481384939344).

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

20868771113856 is a wasteful number, since it uses less digits than its factorization.

20868771113856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47277 (or 47262 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 20868771113856 in words is "twenty trillion, eight hundred sixty-eight billion, seven hundred seventy-one million, one hundred thirteen thousand, eight hundred fifty-six".