20682891166 has 16 divisors (see below), whose sum is σ = 35612585856. Its totient is φ = 8825045976.

The previous prime is 20682891149. The next prime is 20682891179. The reversal of 20682891166 is 66119828602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3250896 + ... + 3257251.

It is an arithmetic number, because the mean of its divisors is an integer number (2225786616).

Almost surely, 2^20682891166 is an apocalyptic number.

20682891166 is a deficient number, since it is larger than the sum of its proper divisors (14929694690).

20682891166 is a wasteful number, since it uses less digits than its factorization.

20682891166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508383.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 20682891166 in words is "twenty billion, six hundred eighty-two million, eight hundred ninety-one thousand, one hundred sixty-six".