19529224009 has 3 divisors (see below), whose sum is σ = 19529363757. Its totient is φ = 19529084262.

The previous prime is 19529224007. The next prime is 19529224021. The reversal of 19529224009 is 90042292591.

The square root of 19529224009 is 139747.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 19529224009 - 2¹ = 19529224007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19529224007) 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 2 ways as a sum of consecutive naturals, for example, 69874 + ... + 209620.

It is an arithmetic number, because the mean of its divisors is an integer number (6509787919).

Almost surely, 2^19529224009 is an apocalyptic number.

19529224009 is the 139747-th square number.

19529224009 is the 69874-th centered octagonal number.

It is an amenable number.

19529224009 is a deficient number, since it is larger than the sum of its proper divisors (139748).

19529224009 is an frugal number, since it uses more digits than its factorization.

19529224009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279494 (or 139747 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 19529224009 in words is "nineteen billion, five hundred twenty-nine million, two hundred twenty-four thousand, nine".