19406384913 has 4 divisors (see below), whose sum is σ = 25875179888. Its totient is φ = 12937589940.

The previous prime is 19406384909. The next prime is 19406384917. The reversal of 19406384913 is 31948360491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (19406384909) and next prime (19406384917).

It is not a de Polignac number, because 19406384913 - 2² = 19406384909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19406384917) 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 3 ways as a sum of consecutive naturals, for example, 3234397483 + ... + 3234397488.

It is an arithmetic number, because the mean of its divisors is an integer number (6468794972).

Almost surely, 2^19406384913 is an apocalyptic number.

It is an amenable number.

19406384913 is a deficient number, since it is larger than the sum of its proper divisors (6468794975).

19406384913 is an equidigital number, since it uses as much as digits as its factorization.

19406384913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468794974.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 19406384913 in words is "nineteen billion, four hundred six million, three hundred eighty-four thousand, nine hundred thirteen".