19473877387 has 4 divisors (see below), whose sum is σ = 19489723920. Its totient is φ = 19458030856.

The previous prime is 19473877361. The next prime is 19473877391. The reversal of 19473877387 is 78377837491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78377837491 = 22367 ⋅3504173.

It is a cyclic number.

It is not a de Polignac number, because 19473877387 - 2¹⁵ = 19473844619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19473875387) 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, 7921423 + ... + 7923880.

It is an arithmetic number, because the mean of its divisors is an integer number (4872430980).

Almost surely, 2^19473877387 is an apocalyptic number.

19473877387 is a deficient number, since it is larger than the sum of its proper divisors (15846533).

19473877387 is a wasteful number, since it uses less digits than its factorization.

19473877387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15846532.

The product of its digits is 49787136, while the sum is 64.

The spelling of 19473877387 in words is "nineteen billion, four hundred seventy-three million, eight hundred seventy-seven thousand, three hundred eighty-seven".