19784294493 has 8 divisors (see below), whose sum is σ = 27930768768. Its totient is φ = 12413674944.

The previous prime is 19784294477. The next prime is 19784294513. The reversal of 19784294493 is 39449248791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19784294493 - 2⁴ = 19784294477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19784294473) 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 7 ways as a sum of consecutive naturals, for example, 193963621 + ... + 193963722.

It is an arithmetic number, because the mean of its divisors is an integer number (3491346096).

Almost surely, 2^19784294493 is an apocalyptic number.

It is an amenable number.

19784294493 is a deficient number, since it is larger than the sum of its proper divisors (8146474275).

19784294493 is a wasteful number, since it uses less digits than its factorization.

19784294493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387927363.

The product of its digits is 15676416, while the sum is 60.

The spelling of 19784294493 in words is "nineteen billion, seven hundred eighty-four million, two hundred ninety-four thousand, four hundred ninety-three".