19543641707 has 2 divisors, whose sum is σ = 19543641708. Its totient is φ = 19543641706.

The previous prime is 19543641679. The next prime is 19543641713. The reversal of 19543641707 is 70714634591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19543641707 - 2²⁰ = 19542593131 is a prime.

It is not a weakly prime, because it can be changed into another prime (19543641787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9771820853 + 9771820854.

It is an arithmetic number, because the mean of its divisors is an integer number (9771820854).

Almost surely, 2^19543641707 is an apocalyptic number.

19543641707 is a deficient number, since it is larger than the sum of its proper divisors (1).

19543641707 is an equidigital number, since it uses as much as digits as its factorization.

19543641707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 19543641707 in words is "nineteen billion, five hundred forty-three million, six hundred forty-one thousand, seven hundred seven".