20855228708 has 12 divisors (see below), whose sum is σ = 36497771520. Its totient is φ = 10427293992.

The previous prime is 20855228707. The next prime is 20855228731. The reversal of 20855228708 is 80782255802.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20855228701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124385 + ... + 239127.

It is an arithmetic number, because the mean of its divisors is an integer number (3041480960).

Almost surely, 2^20855228708 is an apocalyptic number.

It is an amenable number.

20855228708 is a deficient number, since it is larger than the sum of its proper divisors (15642542812).

20855228708 is a wasteful number, since it uses less digits than its factorization.

20855228708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160186 (or 160184 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 47.

The spelling of 20855228708 in words is "twenty billion, eight hundred fifty-five million, two hundred twenty-eight thousand, seven hundred eight".