20705750206 has 12 divisors (see below), whose sum is σ = 32092838496. Its totient is φ = 10018910460.

The previous prime is 20705750189. The next prime is 20705750209. The reversal of 20705750206 is 60205750702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705750209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5384590 + ... + 5388433.

It is an arithmetic number, because the mean of its divisors is an integer number (2674403208).

Almost surely, 2^20705750206 is an apocalyptic number.

20705750206 is a deficient number, since it is larger than the sum of its proper divisors (11387088290).

20705750206 is a wasteful number, since it uses less digits than its factorization.

20705750206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10773087 (or 10773056 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The spelling of 20705750206 in words is "twenty billion, seven hundred five million, seven hundred fifty thousand, two hundred six".