20906492166 has 48 divisors (see below), whose sum is σ = 51815990304. Its totient is φ = 5967798912.

The previous prime is 20906492143. The next prime is 20906492197. The reversal of 20906492166 is 66129460902.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62596 + ... + 213848.

It is an arithmetic number, because the mean of its divisors is an integer number (1079499798).

Almost surely, 2^20906492166 is an apocalyptic number.

20906492166 is an abundant number, since it is smaller than the sum of its proper divisors (30909498138).

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

20906492166 is a wasteful number, since it uses less digits than its factorization.

20906492166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152365 (or 152362 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 20906492166 in words is "twenty billion, nine hundred six million, four hundred ninety-two thousand, one hundred sixty-six".