20726866116 has 240 divisors, whose sum is σ = 62130499200. Its totient is φ = 5963950080.

The previous prime is 20726866099. The next prime is 20726866141. The reversal of 20726866116 is 61166862702.

20726866116 is a `hidden beast` number, since 2 + 0 + 7 + 26 + 8 + 6 + 611 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12212980 + ... + 12214676.

It is an arithmetic number, because the mean of its divisors is an integer number (258877080).

Almost surely, 2^20726866116 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 20726866116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31065249600).

20726866116 is an abundant number, since it is smaller than the sum of its proper divisors (41403633084).

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

20726866116 is a wasteful number, since it uses less digits than its factorization.

20726866116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1885 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 20726866116 in words is "twenty billion, seven hundred twenty-six million, eight hundred sixty-six thousand, one hundred sixteen".