20706440208 has 40 divisors (see below), whose sum is σ = 53625082656. Its totient is φ = 6884928000.

The previous prime is 20706440201. The next prime is 20706440267. The reversal of 20706440208 is 80204460702.

It is not an unprimeable number, because it can be changed into a prime (20706440201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518638 + ... + 557133.

Almost surely, 2^20706440208 is an apocalyptic number.

It is an amenable number.

20706440208 is an abundant number, since it is smaller than the sum of its proper divisors (32918642448).

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

20706440208 is a wasteful number, since it uses less digits than its factorization.

20706440208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076183 (or 1076177 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 20706440208 in words is "twenty billion, seven hundred six million, four hundred forty thousand, two hundred eight".