19968144798140 has 48 divisors (see below), whose sum is σ = 52280233657344. Its totient is φ = 6223837339200.

The previous prime is 19968144798139. The next prime is 19968144798169. The reversal of 19968144798140 is 4189744186991.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6483162356 + ... + 6483165435.

It is an arithmetic number, because the mean of its divisors is an integer number (1089171534528).

Almost surely, 2^{19968144798140} is an apocalyptic number.

19968144798140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19968144798140 is an abundant number, since it is smaller than the sum of its proper divisors (32312088859204).

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

19968144798140 is a wasteful number, since it uses less digits than its factorization.

19968144798140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12966327818 (or 12966327816 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 71.

The spelling of 19968144798140 in words is "nineteen trillion, nine hundred sixty-eight billion, one hundred forty-four million, seven hundred ninety-eight thousand, one hundred forty".