19917384613 has 12 divisors (see below), whose sum is σ = 23708023680. Its totient is φ = 16675017912.

The previous prime is 19917384611. The next prime is 19917384623. The reversal of 19917384613 is 31648371991.

It is not a de Polignac number, because 19917384613 - 2¹ = 19917384611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19917384611) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4724373 + ... + 4728586.

It is an arithmetic number, because the mean of its divisors is an integer number (1975668640).

Almost surely, 2^19917384613 is an apocalyptic number.

It is an amenable number.

19917384613 is a deficient number, since it is larger than the sum of its proper divisors (3790639067).

19917384613 is an equidigital number, since it uses as much as digits as its factorization.

19917384613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9453016 (or 9453009 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The spelling of 19917384613 in words is "nineteen billion, nine hundred seventeen million, three hundred eighty-four thousand, six hundred thirteen".