19793325577 has 2 divisors, whose sum is σ = 19793325578. Its totient is φ = 19793325576.

The previous prime is 19793325553. The next prime is 19793325581. The reversal of 19793325577 is 77552339791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19206910921 + 586414656 = 138589^2 + 24216^2 .

It is an emirp because it is prime and its reverse (77552339791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19793325577 - 2¹⁹ = 19792801289 is a prime.

It is not a weakly prime, because it can be changed into another prime (19793325077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9896662788 + 9896662789.

It is an arithmetic number, because the mean of its divisors is an integer number (9896662789).

Almost surely, 2^19793325577 is an apocalyptic number.

It is an amenable number.

19793325577 is a deficient number, since it is larger than the sum of its proper divisors (1).

19793325577 is an equidigital number, since it uses as much as digits as its factorization.

19793325577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12502350, while the sum is 58.

The spelling of 19793325577 in words is "nineteen billion, seven hundred ninety-three million, three hundred twenty-five thousand, five hundred seventy-seven".