19406969305 has 8 divisors (see below), whose sum is σ = 23294105352. Its totient is φ = 15521747328.

The previous prime is 19406969287. The next prime is 19406969321. The reversal of 19406969305 is 50396960491.

It can be written as a sum of positive squares in 4 ways, for example, as 533979664 + 18872989641 = 23108^2 + 137379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19406969305 - 2⁹ = 19406968793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 456114 + ... + 496843.

It is an arithmetic number, because the mean of its divisors is an integer number (2911763169).

Almost surely, 2^19406969305 is an apocalyptic number.

It is an amenable number.

19406969305 is a deficient number, since it is larger than the sum of its proper divisors (3887136047).

19406969305 is an equidigital number, since it uses as much as digits as its factorization.

19406969305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957035.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 19406969305 in words is "nineteen billion, four hundred six million, nine hundred sixty-nine thousand, three hundred five".