19935645812 has 12 divisors (see below), whose sum is σ = 34893731040. Its totient is φ = 9966008376.

The previous prime is 19935645809. The next prime is 19935645911. The reversal of 19935645812 is 21854653991.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 428762 + ... + 472977.

It is an arithmetic number, because the mean of its divisors is an integer number (2907810920).

Almost surely, 2^19935645812 is an apocalyptic number.

It is an amenable number.

19935645812 is a deficient number, since it is larger than the sum of its proper divisors (14958085228).

19935645812 is a wasteful number, since it uses less digits than its factorization.

19935645812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907270 (or 907268 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 53.

The spelling of 19935645812 in words is "nineteen billion, nine hundred thirty-five million, six hundred forty-five thousand, eight hundred twelve".