20889776106 has 24 divisors (see below), whose sum is σ = 46003170564. Its totient is φ = 6849106560.

The previous prime is 20889776093. The next prime is 20889776111. The reversal of 20889776106 is 60167798802.

20889776106 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18222570081 + 2667206025 = 134991^2 + 51645^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9511551 + ... + 9513746.

Almost surely, 2^20889776106 is an apocalyptic number.

20889776106 is an abundant number, since it is smaller than the sum of its proper divisors (25113394458).

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

20889776106 is a wasteful number, since it uses less digits than its factorization.

20889776106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19025366 (or 19025363 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 20889776106 in words is "twenty billion, eight hundred eighty-nine million, seven hundred seventy-six thousand, one hundred six".