18448589447 has 2 divisors, whose sum is σ = 18448589448. Its totient is φ = 18448589446.

The previous prime is 18448589399. The next prime is 18448589479. The reversal of 18448589447 is 74498584481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18448589447 - 2¹⁶ = 18448523911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18448589447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18448582447) 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 as a sum of consecutive naturals, namely, 9224294723 + 9224294724.

It is an arithmetic number, because the mean of its divisors is an integer number (9224294724).

Almost surely, 2^18448589447 is an apocalyptic number.

18448589447 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448589447 is an equidigital number, since it uses as much as digits as its factorization.

18448589447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41287680, while the sum is 62.

The spelling of 18448589447 in words is "eighteen billion, four hundred forty-eight million, five hundred eighty-nine thousand, four hundred forty-seven".