19985739362803 has 2 divisors, whose sum is σ = 19985739362804. Its totient is φ = 19985739362802.

The previous prime is 19985739362773. The next prime is 19985739362821. The reversal of 19985739362803 is 30826393758991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19985739362803 - 2⁹ = 19985739362291 is a prime.

It is not a weakly prime, because it can be changed into another prime (19985739362503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9992869681401 + 9992869681402.

It is an arithmetic number, because the mean of its divisors is an integer number (9992869681402).

Almost surely, 2^{19985739362803} is an apocalyptic number.

19985739362803 is a deficient number, since it is larger than the sum of its proper divisors (1).

19985739362803 is an equidigital number, since it uses as much as digits as its factorization.

19985739362803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529079040, while the sum is 73.

The spelling of 19985739362803 in words is "nineteen trillion, nine hundred eighty-five billion, seven hundred thirty-nine million, three hundred sixty-two thousand, eight hundred three".