19706825129 has 2 divisors, whose sum is σ = 19706825130. Its totient is φ = 19706825128.

The previous prime is 19706825113. The next prime is 19706825141. The reversal of 19706825129 is 92152860791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19362165904 + 344659225 = 139148^2 + 18565^2 .

It is a cyclic number.

It is not a de Polignac number, because 19706825129 - 2⁴ = 19706825113 is a prime.

It is not a weakly prime, because it can be changed into another prime (19706825729) 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, 9853412564 + 9853412565.

It is an arithmetic number, because the mean of its divisors is an integer number (9853412565).

Almost surely, 2^19706825129 is an apocalyptic number.

It is an amenable number.

19706825129 is a deficient number, since it is larger than the sum of its proper divisors (1).

19706825129 is an equidigital number, since it uses as much as digits as its factorization.

19706825129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 19706825129 in words is "nineteen billion, seven hundred six million, eight hundred twenty-five thousand, one hundred twenty-nine".