19794535065 has 96 divisors (see below), whose sum is σ = 36763084800. Its totient is φ = 9823731840.

The previous prime is 19794535043. The next prime is 19794535073. The reversal of 19794535065 is 56053549791.

19794535065 is a `hidden beast` number, since 1 + 97 + 9 + 45 + 3 + 506 + 5 = 666.

It is not a de Polignac number, because 19794535065 - 2¹⁰ = 19794534041 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15332070 + ... + 15333360.

It is an arithmetic number, because the mean of its divisors is an integer number (382948800).

Almost surely, 2^19794535065 is an apocalyptic number.

19794535065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19794535065 is a deficient number, since it is larger than the sum of its proper divisors (16968549735).

19794535065 is a wasteful number, since it uses less digits than its factorization.

19794535065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 5103000, while the sum is 54.

The spelling of 19794535065 in words is "nineteen billion, seven hundred ninety-four million, five hundred thirty-five thousand, sixty-five".