19471489547 has 2 divisors, whose sum is σ = 19471489548. Its totient is φ = 19471489546.

The previous prime is 19471489537. The next prime is 19471489591. The reversal of 19471489547 is 74598417491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19471489547 - 2⁶ = 19471489483 is a prime.

It is not a weakly prime, because it can be changed into another prime (19471489507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9735744773 + 9735744774.

It is an arithmetic number, because the mean of its divisors is an integer number (9735744774).

Almost surely, 2^19471489547 is an apocalyptic number.

19471489547 is a deficient number, since it is larger than the sum of its proper divisors (1).

19471489547 is an equidigital number, since it uses as much as digits as its factorization.

19471489547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 59.

The spelling of 19471489547 in words is "nineteen billion, four hundred seventy-one million, four hundred eighty-nine thousand, five hundred forty-seven".