19966057576 has 16 divisors (see below), whose sum is σ = 38727267300. Its totient is φ = 9638786304.

The previous prime is 19966057571. The next prime is 19966057589. The reversal of 19966057576 is 67575066991.

It can be written as a sum of positive squares in 2 ways, for example, as 19957212900 + 8844676 = 141270^2 + 2974^2 .

It is not an unprimeable number, because it can be changed into a prime (19966057571) 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, 43030065 + ... + 43030528.

Almost surely, 2^19966057576 is an apocalyptic number.

It is an amenable number.

19966057576 is a deficient number, since it is larger than the sum of its proper divisors (18761209724).

19966057576 is a wasteful number, since it uses less digits than its factorization.

19966057576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86060628 (or 86060624 counting only the distinct ones).

The product of its (nonzero) digits is 21432600, while the sum is 61.

The spelling of 19966057576 in words is "nineteen billion, nine hundred sixty-six million, fifty-seven thousand, five hundred seventy-six".