19740047466239 has 2 divisors, whose sum is σ = 19740047466240. Its totient is φ = 19740047466238.

The previous prime is 19740047466221. The next prime is 19740047466299. The reversal of 19740047466239 is 93266474004791.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19740047466239 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19740047466299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870023733119 + 9870023733120.

It is an arithmetic number, because the mean of its divisors is an integer number (9870023733120).

Almost surely, 2^{19740047466239} is an apocalyptic number.

19740047466239 is a deficient number, since it is larger than the sum of its proper divisors (1).

19740047466239 is an equidigital number, since it uses as much as digits as its factorization.

19740047466239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 19740047466239 in words is "nineteen trillion, seven hundred forty billion, forty-seven million, four hundred sixty-six thousand, two hundred thirty-nine".