19810106912 has 24 divisors (see below), whose sum is σ = 39004632576. Its totient is φ = 9904168512.

The previous prime is 19810106909. The next prime is 19810106929. The reversal of 19810106912 is 21960101891.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478793 + ... + 518519.

It is an arithmetic number, because the mean of its divisors is an integer number (1625193024).

Almost surely, 2^19810106912 is an apocalyptic number.

It is an amenable number.

19810106912 is a deficient number, since it is larger than the sum of its proper divisors (19194525664).

19810106912 is a wasteful number, since it uses less digits than its factorization.

19810106912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55320 (or 55312 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 19810106912 in words is "nineteen billion, eight hundred ten million, one hundred six thousand, nine hundred twelve".