19416866856 has 16 divisors (see below), whose sum is σ = 48542167200. Its totient is φ = 6472288944.

The previous prime is 19416866851. The next prime is 19416866867. The reversal of 19416866856 is 65866861491.

It is a super-3 number, since 3×19416866856³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19416866856.

It is not an unprimeable number, because it can be changed into a prime (19416866851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404518036 + ... + 404518083.

It is an arithmetic number, because the mean of its divisors is an integer number (3033885450).

Almost surely, 2^19416866856 is an apocalyptic number.

It is an amenable number.

19416866856 is an abundant number, since it is smaller than the sum of its proper divisors (29125300344).

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

19416866856 is a wasteful number, since it uses less digits than its factorization.

19416866856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809036128 (or 809036124 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 60.

The spelling of 19416866856 in words is "nineteen billion, four hundred sixteen million, eight hundred sixty-six thousand, eight hundred fifty-six".