19952410009 has 27 divisors (see below), whose sum is σ = 24676337343. Its totient is φ = 16082501568.

The previous prime is 19952410007. The next prime is 19952410063. The reversal of 19952410009 is 90001425991.

The square root of 19952410009 is 141253.

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., 15533883225 + 4418526784 = 124635^2 + 66472^2 .

It is not a de Polignac number, because 19952410009 - 2¹ = 19952410007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19952410007) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16808514 + ... + 16809700.

Almost surely, 2^19952410009 is an apocalyptic number.

19952410009 is the 141253-rd square number.

19952410009 is the 70627-th centered octagonal number.

It is an amenable number.

19952410009 is a deficient number, since it is larger than the sum of its proper divisors (4723927334).

19952410009 is an frugal number, since it uses more digits than its factorization.

19952410009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 19952410009 in words is "nineteen billion, nine hundred fifty-two million, four hundred ten thousand, nine".