19705702139 has 2 divisors, whose sum is σ = 19705702140. Its totient is φ = 19705702138.

The previous prime is 19705702103. The next prime is 19705702147. The reversal of 19705702139 is 93120750791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19705702139 - 2²⁴ = 19688924923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19705702139.

It is not a weakly prime, because it can be changed into another prime (19705702169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9852851069 + 9852851070.

It is an arithmetic number, because the mean of its divisors is an integer number (9852851070).

Almost surely, 2^19705702139 is an apocalyptic number.

19705702139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19705702139 is an equidigital number, since it uses as much as digits as its factorization.

19705702139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 44.

The spelling of 19705702139 in words is "nineteen billion, seven hundred five million, seven hundred two thousand, one hundred thirty-nine".