19838722499 has 16 divisors (see below), whose sum is σ = 20427755040. Its totient is φ = 19258690560.

The previous prime is 19838722481. The next prime is 19838722511. The reversal of 19838722499 is 99422783891.

It is a Cunningham number, because it is equal to 140850²-1.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19838722499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19838722429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8590757 + ... + 8593065.

It is an arithmetic number, because the mean of its divisors is an integer number (1276734690).

Almost surely, 2^19838722499 is an apocalyptic number.

19838722499 is a deficient number, since it is larger than the sum of its proper divisors (589032541).

19838722499 is a wasteful number, since it uses less digits than its factorization.

19838722499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150.

The product of its digits is 15676416, while the sum is 62.

The spelling of 19838722499 in words is "nineteen billion, eight hundred thirty-eight million, seven hundred twenty-two thousand, four hundred ninety-nine".