19391407013 has 4 divisors (see below), whose sum is σ = 21154262208. Its totient is φ = 17628551820.

The previous prime is 19391406971. The next prime is 19391407043. The reversal of 19391407013 is 31070419391.

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 a de Polignac number, because none of the positive numbers 2^k-19391407013 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 (19391407043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881427581 + ... + 881427602.

It is an arithmetic number, because the mean of its divisors is an integer number (5288565552).

Almost surely, 2^19391407013 is an apocalyptic number.

It is an amenable number.

19391407013 is a deficient number, since it is larger than the sum of its proper divisors (1762855195).

19391407013 is a wasteful number, since it uses less digits than its factorization.

19391407013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762855194.

The product of its (nonzero) digits is 20412, while the sum is 38.

The spelling of 19391407013 in words is "nineteen billion, three hundred ninety-one million, four hundred seven thousand, thirteen".