19549680929 has 2 divisors, whose sum is σ = 19549680930. Its totient is φ = 19549680928.

The previous prime is 19549680889. The next prime is 19549681027. The reversal of 19549680929 is 92908694591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18755850304 + 793830625 = 136952^2 + 28175^2 .

It is an emirp because it is prime and its reverse (92908694591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19549680929 - 2¹² = 19549676833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19549688929) 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, 9774840464 + 9774840465.

It is an arithmetic number, because the mean of its divisors is an integer number (9774840465).

Almost surely, 2^19549680929 is an apocalyptic number.

It is an amenable number.

19549680929 is a deficient number, since it is larger than the sum of its proper divisors (1).

19549680929 is an equidigital number, since it uses as much as digits as its factorization.

19549680929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 62.

The spelling of 19549680929 in words is "nineteen billion, five hundred forty-nine million, six hundred eighty thousand, nine hundred twenty-nine".