19465866349 has 2 divisors, whose sum is σ = 19465866350. Its totient is φ = 19465866348.

The previous prime is 19465866293. The next prime is 19465866353. The reversal of 19465866349 is 94366856491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17252822500 + 2213043849 = 131350^2 + 47043^2 .

It is a cyclic number.

It is not a de Polignac number, because 19465866349 - 2¹⁵ = 19465833581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19465866379) 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, 9732933174 + 9732933175.

It is an arithmetic number, because the mean of its divisors is an integer number (9732933175).

Almost surely, 2^19465866349 is an apocalyptic number.

It is an amenable number.

19465866349 is a deficient number, since it is larger than the sum of its proper divisors (1).

19465866349 is an equidigital number, since it uses as much as digits as its factorization.

19465866349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 61.

The spelling of 19465866349 in words is "nineteen billion, four hundred sixty-five million, eight hundred sixty-six thousand, three hundred forty-nine".