20512662912 has 320 divisors, whose sum is σ = 70433325600. Its totient is φ = 5804752896.

The previous prime is 20512662883. The next prime is 20512662917. The reversal of 20512662912 is 21926621502.

20512662912 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 26 + 629 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512662917) 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, 7909488 + ... + 7912080.

Almost surely, 2^20512662912 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 20512662912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35216662800).

20512662912 is an abundant number, since it is smaller than the sum of its proper divisors (49920662688).

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

20512662912 is a wasteful number, since it uses less digits than its factorization.

20512662912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 20512662912 in words is "twenty billion, five hundred twelve million, six hundred sixty-two thousand, nine hundred twelve".