20563012512 has 240 divisors, whose sum is σ = 69524687232. Its totient is φ = 5840294400.

The previous prime is 20563012511. The next prime is 20563012517. The reversal of 20563012512 is 21521036502.

It is a happy number.

20563012512 is a `hidden beast` number, since 2 + 0 + 5 + 630 + 1 + 25 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20563012511) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3135637 + ... + 3142187.

Almost surely, 2^20563012512 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 20563012512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34762343616).

20563012512 is an abundant number, since it is smaller than the sum of its proper divisors (48961674720).

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

20563012512 is a wasteful number, since it uses less digits than its factorization.

20563012512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753 (or 6736 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20563012512 in words is "twenty billion, five hundred sixty-three million, twelve thousand, five hundred twelve".