20168547966 has 32 divisors (see below), whose sum is σ = 51221710080. Its totient is φ = 5762442168.

The previous prime is 20168547953. The next prime is 20168547977. The reversal of 20168547966 is 66974586102.

20168547966 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 8 + 547 + 96 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 26677596 + ... + 26678351.

It is an arithmetic number, because the mean of its divisors is an integer number (1600678440).

Almost surely, 2^20168547966 is an apocalyptic number.

20168547966 is an abundant number, since it is smaller than the sum of its proper divisors (31053162114).

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

20168547966 is a wasteful number, since it uses less digits than its factorization.

20168547966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53355965 (or 53355959 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 20168547966 in words is "twenty billion, one hundred sixty-eight million, five hundred forty-seven thousand, nine hundred sixty-six".