19824918794 has 4 divisors (see below), whose sum is σ = 29737378194. Its totient is φ = 9912459396.

The previous prime is 19824918791. The next prime is 19824918811. The reversal of 19824918794 is 49781942891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16214711569 + 3610207225 = 127337^2 + 60085^2 .

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 as a sum of consecutive naturals, namely, 4956229697 + ... + 4956229700.

Almost surely, 2^19824918794 is an apocalyptic number.

19824918794 is a deficient number, since it is larger than the sum of its proper divisors (9912459400).

19824918794 is an equidigital number, since it uses as much as digits as its factorization.

19824918794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9912459399.

The product of its digits is 10450944, while the sum is 62.

The spelling of 19824918794 in words is "nineteen billion, eight hundred twenty-four million, nine hundred eighteen thousand, seven hundred ninety-four".