19882573148549 has 2 divisors, whose sum is σ = 19882573148550. Its totient is φ = 19882573148548.

The previous prime is 19882573148491. The next prime is 19882573148573. The reversal of 19882573148549 is 94584137528891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11242541940100 + 8640031208449 = 3352990^2 + 2939393^2 .

It is a cyclic number.

It is not a de Polignac number, because 19882573148549 - 2¹² = 19882573144453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19882573148849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9941286574274 + 9941286574275.

It is an arithmetic number, because the mean of its divisors is an integer number (9941286574275).

Almost surely, 2^{19882573148549} is an apocalyptic number.

It is an amenable number.

19882573148549 is a deficient number, since it is larger than the sum of its proper divisors (1).

19882573148549 is an equidigital number, since it uses as much as digits as its factorization.

19882573148549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 696729600, while the sum is 74.

The spelling of 19882573148549 in words is "nineteen trillion, eight hundred eighty-two billion, five hundred seventy-three million, one hundred forty-eight thousand, five hundred forty-nine".