19785239650223 has 2 divisors, whose sum is σ = 19785239650224. Its totient is φ = 19785239650222.

The previous prime is 19785239650213. The next prime is 19785239650249. The reversal of 19785239650223 is 32205693258791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19785239650223 - 2²⁴ = 19785222873007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19785239650213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9892619825111 + 9892619825112.

It is an arithmetic number, because the mean of its divisors is an integer number (9892619825112).

Almost surely, 2^{19785239650223} is an apocalyptic number.

19785239650223 is a deficient number, since it is larger than the sum of its proper divisors (1).

19785239650223 is an equidigital number, since it uses as much as digits as its factorization.

19785239650223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 19785239650223 in words is "nineteen trillion, seven hundred eighty-five billion, two hundred thirty-nine million, six hundred fifty thousand, two hundred twenty-three".