19550471329 has 9 divisors (see below), whose sum is σ = 20098461747. Its totient is φ = 19017046584.

The previous prime is 19550471299. The next prime is 19550471351. The reversal of 19550471329 is 92317405591.

The square root of 19550471329 is 139823.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 17494030225 + 2056441104 = 132265^2 + 45348^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19550471329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19550471389) 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 in 8 ways as a sum of consecutive naturals, for example, 5171562 + ... + 5175340.

Almost surely, 2^19550471329 is an apocalyptic number.

19550471329 is the 139823-rd square number.

19550471329 is the 69912-nd centered octagonal number.

It is an amenable number.

19550471329 is a deficient number, since it is larger than the sum of its proper divisors (547990418).

19550471329 is an frugal number, since it uses more digits than its factorization.

19550471329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 19550471329 in words is "nineteen billion, five hundred fifty million, four hundred seventy-one thousand, three hundred twenty-nine".