19558505429 has 2 divisors, whose sum is σ = 19558505430. Its totient is φ = 19558505428.

The previous prime is 19558505387. The next prime is 19558505431. The reversal of 19558505429 is 92450585591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18515861329 + 1042644100 = 136073^2 + 32290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19558505429 is a prime.

Together with 19558505431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19558504429) 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, 9779252714 + 9779252715.

It is an arithmetic number, because the mean of its divisors is an integer number (9779252715).

Almost surely, 2^19558505429 is an apocalyptic number.

It is an amenable number.

19558505429 is a deficient number, since it is larger than the sum of its proper divisors (1).

19558505429 is an equidigital number, since it uses as much as digits as its factorization.

19558505429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240000, while the sum is 53.

The spelling of 19558505429 in words is "nineteen billion, five hundred fifty-eight million, five hundred five thousand, four hundred twenty-nine".