19778367229984 has 48 divisors (see below), whose sum is σ = 42636451697280. Its totient is φ = 8956746184960.

The previous prime is 19778367229969. The next prime is 19778367230033. The reversal of 19778367229984 is 48992276387791.

It is a junction number, because it is equal to n+sod(n) for n = 19778367229898 and 19778367229907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104344984 + ... + 104534359.

It is an arithmetic number, because the mean of its divisors is an integer number (888259410360).

Almost surely, 2^{19778367229984} is an apocalyptic number.

It is an amenable number.

19778367229984 is an abundant number, since it is smaller than the sum of its proper divisors (22858084467296).

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

19778367229984 is a wasteful number, since it uses less digits than its factorization.

19778367229984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208879633 (or 208879625 counting only the distinct ones).

The product of its digits is 4608866304, while the sum is 82.

The spelling of 19778367229984 in words is "nineteen trillion, seven hundred seventy-eight billion, three hundred sixty-seven million, two hundred twenty-nine thousand, nine hundred eighty-four".