20966403168 has 36 divisors (see below), whose sum is σ = 59623209828. Its totient is φ = 6988800960.

The previous prime is 20966403077. The next prime is 20966403173. The reversal of 20966403168 is 86130466902.

20966403168 is a `hidden beast` number, since 20 + 9 + 66 + 403 + 168 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36399718 + ... + 36400293.

It is an arithmetic number, because the mean of its divisors is an integer number (1656200273).

Almost surely, 2^20966403168 is an apocalyptic number.

It is an amenable number.

20966403168 is an abundant number, since it is smaller than the sum of its proper divisors (38656806660).

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

20966403168 is a wasteful number, since it uses less digits than its factorization.

20966403168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72800027 (or 72800016 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20966403168 in words is "twenty billion, nine hundred sixty-six million, four hundred three thousand, one hundred sixty-eight".