19224654409 has 9 divisors (see below), whose sum is σ = 19553581749. Its totient is φ = 18901176960.

The previous prime is 19224654389. The next prime is 19224654419. The reversal of 19224654409 is 90445642291.

It is a happy number.

The square root of 19224654409 is 138653.

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

It can be written as a sum of positive squares in 4 ways, for example, as 463325625 + 18761328784 = 21525^2 + 136972^2 .

It is not a de Polignac number, because 19224654409 - 2⁵ = 19224654377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19224654419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8456697 + ... + 8458969.

Almost surely, 2^19224654409 is an apocalyptic number.

19224654409 is the 138653-rd square number.

19224654409 is the 69327-th centered octagonal number.

It is an amenable number.

19224654409 is a deficient number, since it is larger than the sum of its proper divisors (328927340).

19224654409 is an frugal number, since it uses more digits than its factorization.

19224654409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 19224654409 in words is "nineteen billion, two hundred twenty-four million, six hundred fifty-four thousand, four hundred nine".