19528261447 has 2 divisors, whose sum is σ = 19528261448. Its totient is φ = 19528261446.

The previous prime is 19528261397. The next prime is 19528261469. The reversal of 19528261447 is 74416282591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19528261447 - 2²⁷ = 19394043719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19528261447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19528261547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9764130723 + 9764130724.

It is an arithmetic number, because the mean of its divisors is an integer number (9764130724).

Almost surely, 2^19528261447 is an apocalyptic number.

19528261447 is a deficient number, since it is larger than the sum of its proper divisors (1).

19528261447 is an equidigital number, since it uses as much as digits as its factorization.

19528261447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The spelling of 19528261447 in words is "nineteen billion, five hundred twenty-eight million, two hundred sixty-one thousand, four hundred forty-seven".