19824918793 has 6 divisors (see below), whose sum is σ = 20724348554. Its totient is φ = 18962965296.

The previous prime is 19824918791. The next prime is 19824918811. The reversal of 19824918793 is 39781942891.

It can be written as a sum of positive squares in only one way, i.e., 19690544329 + 134374464 = 140323^2 + 11592^2 .

It is not a de Polignac number, because 19824918793 - 2¹ = 19824918791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19824918791) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 18737580 + ... + 18738637.

Almost surely, 2^19824918793 is an apocalyptic number.

It is an amenable number.

19824918793 is a deficient number, since it is larger than the sum of its proper divisors (899429761).

19824918793 is an equidigital number, since it uses as much as digits as its factorization.

19824918793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37476263 (or 37476240 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 61.

The spelling of 19824918793 in words is "nineteen billion, eight hundred twenty-four million, nine hundred eighteen thousand, seven hundred ninety-three".