19886047278966 has 96 divisors (see below), whose sum is σ = 52387673270400. Its totient is φ = 5373094659840.

The previous prime is 19886047278959. The next prime is 19886047279093. The reversal of 19886047278966 is 66987274068891.

19886047278966 is a `hidden beast` number, since 1 + 9 + 8 + 8 + 6 + 0 + 472 + 7 + 89 + 66 = 666.

It is a super-3 number, since 3×19886047278966³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155407536 + ... + 155535443.

It is an arithmetic number, because the mean of its divisors is an integer number (545704929900).

Almost surely, 2^{19886047278966} is an apocalyptic number.

19886047278966 is an abundant number, since it is smaller than the sum of its proper divisors (32501625991434).

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

19886047278966 is a wasteful number, since it uses less digits than its factorization.

19886047278966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310943034 (or 310943031 counting only the distinct ones).

The product of its (nonzero) digits is 3511517184, while the sum is 81.

The spelling of 19886047278966 in words is "nineteen trillion, eight hundred eighty-six billion, forty-seven million, two hundred seventy-eight thousand, nine hundred sixty-six".