17921146806 has 20 divisors (see below), whose sum is σ = 40156644132. Its totient is φ = 5973715548.

The previous prime is 17921146783. The next prime is 17921146871. The reversal of 17921146806 is 60864112971.

17921146806 is a `hidden beast` number, since 179 + 2 + 11 + 468 + 0 + 6 = 666.

17921146806 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55312020 + ... + 55312343.

Almost surely, 2^17921146806 is an apocalyptic number.

17921146806 is an abundant number, since it is smaller than the sum of its proper divisors (22235497326).

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

17921146806 is a wasteful number, since it uses less digits than its factorization.

17921146806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110624377 (or 110624368 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 17921146806 in words is "seventeen billion, nine hundred twenty-one million, one hundred forty-six thousand, eight hundred six".