19224017993 has 2 divisors, whose sum is σ = 19224017994. Its totient is φ = 19224017992.

The previous prime is 19224017977. The next prime is 19224018061. The reversal of 19224017993 is 39971042291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19139892409 + 84125584 = 138347^2 + 9172^2 .

It is a cyclic number.

It is not a de Polignac number, because 19224017993 - 2⁴ = 19224017977 is a prime.

It is not a weakly prime, because it can be changed into another prime (19224019993) 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, 9612008996 + 9612008997.

It is an arithmetic number, because the mean of its divisors is an integer number (9612008997).

Almost surely, 2^19224017993 is an apocalyptic number.

It is an amenable number.

19224017993 is a deficient number, since it is larger than the sum of its proper divisors (1).

19224017993 is an equidigital number, since it uses as much as digits as its factorization.

19224017993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 19224017993 in words is "nineteen billion, two hundred twenty-four million, seventeen thousand, nine hundred ninety-three".