19910944371996 has 48 divisors (see below), whose sum is σ = 51621216192000. Its totient is φ = 6636949404336.

The previous prime is 19910944371973. The next prime is 19910944372037. The reversal of 19910944371996 is 69917344901991.

19910944371996 is a `hidden beast` number, since 1 + 9 + 9 + 1 + 0 + 94 + 437 + 19 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35099311 + ... + 35662073.

It is an arithmetic number, because the mean of its divisors is an integer number (1075442004000).

Almost surely, 2^{19910944371996} is an apocalyptic number.

It is an amenable number.

19910944371996 is an abundant number, since it is smaller than the sum of its proper divisors (31710271820004).

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

19910944371996 is a wasteful number, since it uses less digits than its factorization.

19910944371996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890375 (or 890367 counting only the distinct ones).

The product of its (nonzero) digits is 119042784, while the sum is 72.

The spelling of 19910944371996 in words is "nineteen trillion, nine hundred ten billion, nine hundred forty-four million, three hundred seventy-one thousand, nine hundred ninety-six".