20966726888 has 16 divisors (see below), whose sum is σ = 39319183680. Its totient is φ = 10481611248.

The previous prime is 20966726887. The next prime is 20966726897. The reversal of 20966726888 is 88862766902.

It is a self number, because there is not a number n which added to its sum of digits gives 20966726888.

It is not an unprimeable number, because it can be changed into a prime (20966726887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167456 + ... + 264527.

It is an arithmetic number, because the mean of its divisors is an integer number (2457448980).

Almost surely, 2^20966726888 is an apocalyptic number.

It is an amenable number.

20966726888 is a deficient number, since it is larger than the sum of its proper divisors (18352456792).

20966726888 is a wasteful number, since it uses less digits than its factorization.

20966726888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438056 (or 438052 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 20966726888 in words is "twenty billion, nine hundred sixty-six million, seven hundred twenty-six thousand, eight hundred eighty-eight".