20783858308 has 12 divisors (see below), whose sum is σ = 36513278172. Its totient is φ = 10351493120.

The previous prime is 20783858201. The next prime is 20783858309. The reversal of 20783858308 is 80385838702.

It can be written as a sum of positive squares in 2 ways, for example, as 16671457924 + 4112400384 = 129118^2 + 64128^2 .

It is not an unprimeable number, because it can be changed into a prime (20783858309) 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 3 ways as a sum of consecutive naturals, for example, 10107853 + ... + 10109908.

It is an arithmetic number, because the mean of its divisors is an integer number (3042773181).

Almost surely, 2^20783858308 is an apocalyptic number.

It is an amenable number.

20783858308 is a deficient number, since it is larger than the sum of its proper divisors (15729419864).

20783858308 is a wasteful number, since it uses less digits than its factorization.

20783858308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20218022 (or 20218020 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 20783858308 in words is "twenty billion, seven hundred eighty-three million, eight hundred fifty-eight thousand, three hundred eight".