19528228639 has 2 divisors, whose sum is σ = 19528228640. Its totient is φ = 19528228638.

The previous prime is 19528228589. The next prime is 19528228651. The reversal of 19528228639 is 93682282591.

It is a strong prime.

It is an emirp because it is prime and its reverse (93682282591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19528228639 - 2¹⁵ = 19528195871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19528228639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19528226639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9764114319 + 9764114320.

It is an arithmetic number, because the mean of its divisors is an integer number (9764114320).

Almost surely, 2^19528228639 is an apocalyptic number.

19528228639 is a deficient number, since it is larger than the sum of its proper divisors (1).

19528228639 is an equidigital number, since it uses as much as digits as its factorization.

19528228639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 55.

The spelling of 19528228639 in words is "nineteen billion, five hundred twenty-eight million, two hundred twenty-eight thousand, six hundred thirty-nine".