19965775712 has 24 divisors (see below), whose sum is σ = 39316671576. Its totient is φ = 9980589312.

The previous prime is 19965775703. The next prime is 19965775717. The reversal of 19965775712 is 21757756991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19965775717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73868 + ... + 213044.

It is an arithmetic number, because the mean of its divisors is an integer number (1638194649).

Almost surely, 2^19965775712 is an apocalyptic number.

It is an amenable number.

19965775712 is a deficient number, since it is larger than the sum of its proper divisors (19350895864).

19965775712 is a wasteful number, since it uses less digits than its factorization.

19965775712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143670 (or 143662 counting only the distinct ones).

The product of its digits is 8334900, while the sum is 59.

The spelling of 19965775712 in words is "nineteen billion, nine hundred sixty-five million, seven hundred seventy-five thousand, seven hundred twelve".