19424698987 has 2 divisors, whose sum is σ = 19424698988. Its totient is φ = 19424698986.

The previous prime is 19424698919. The next prime is 19424699009. The reversal of 19424698987 is 78989642491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19424698987 - 2¹¹ = 19424696939 is a prime.

It is not a weakly prime, because it can be changed into another prime (19424698187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9712349493 + 9712349494.

It is an arithmetic number, because the mean of its divisors is an integer number (9712349494).

Almost surely, 2^19424698987 is an apocalyptic number.

19424698987 is a deficient number, since it is larger than the sum of its proper divisors (1).

19424698987 is an equidigital number, since it uses as much as digits as its factorization.

19424698987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 67.

The spelling of 19424698987 in words is "nineteen billion, four hundred twenty-four million, six hundred ninety-eight thousand, nine hundred eighty-seven".