19890298573 has 2 divisors, whose sum is σ = 19890298574. Its totient is φ = 19890298572.

The previous prime is 19890298517. The next prime is 19890298577. The reversal of 19890298573 is 37589209891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18318810409 + 1571488164 = 135347^2 + 39642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19890298573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19890298577) 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 as a sum of consecutive naturals, namely, 9945149286 + 9945149287.

It is an arithmetic number, because the mean of its divisors is an integer number (9945149287).

Almost surely, 2^19890298573 is an apocalyptic number.

It is an amenable number.

19890298573 is a deficient number, since it is larger than the sum of its proper divisors (1).

19890298573 is an equidigital number, since it uses as much as digits as its factorization.

19890298573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 19890298573 in words is "nineteen billion, eight hundred ninety million, two hundred ninety-eight thousand, five hundred seventy-three".