19427577047 has 4 divisors (see below), whose sum is σ = 19510957440. Its totient is φ = 19344196656.

The previous prime is 19427576977. The next prime is 19427577077. The reversal of 19427577047 is 74077572491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19427577047 - 2²⁴ = 19410799831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19427577047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19427577077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41689847 + ... + 41690312.

It is an arithmetic number, because the mean of its divisors is an integer number (4877739360).

Almost surely, 2^19427577047 is an apocalyptic number.

19427577047 is a deficient number, since it is larger than the sum of its proper divisors (83380393).

19427577047 is an equidigital number, since it uses as much as digits as its factorization.

19427577047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83380392.

The product of its (nonzero) digits is 3457440, while the sum is 53.

The spelling of 19427577047 in words is "nineteen billion, four hundred twenty-seven million, five hundred seventy-seven thousand, forty-seven".