19934004247 has 2 divisors, whose sum is σ = 19934004248. Its totient is φ = 19934004246.

The previous prime is 19934004241. The next prime is 19934004263. The reversal of 19934004247 is 74240043991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19934004247 - 2²⁷ = 19799786519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19934004241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9967002123 + 9967002124.

It is an arithmetic number, because the mean of its divisors is an integer number (9967002124).

Almost surely, 2^19934004247 is an apocalyptic number.

19934004247 is a deficient number, since it is larger than the sum of its proper divisors (1).

19934004247 is an equidigital number, since it uses as much as digits as its factorization.

19934004247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 19934004247 in words is "nineteen billion, nine hundred thirty-four million, four thousand, two hundred forty-seven".