19906197144 has 32 divisors (see below), whose sum is σ = 49773150000. Its totient is φ = 6634378112.

The previous prime is 19906197127. The next prime is 19906197149. The reversal of 19906197144 is 44179160991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19906197149) 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 7 ways as a sum of consecutive naturals, for example, 104482 + ... + 225230.

Almost surely, 2^19906197144 is an apocalyptic number.

It is an amenable number.

19906197144 is an abundant number, since it is smaller than the sum of its proper divisors (29866952856).

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

19906197144 is a wasteful number, since it uses less digits than its factorization.

19906197144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127627 (or 127623 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 19906197144 in words is "nineteen billion, nine hundred six million, one hundred ninety-seven thousand, one hundred forty-four".