19799232209 has 8 divisors (see below), whose sum is σ = 20692214592. Its totient is φ = 18908928720.

The previous prime is 19799232203. The next prime is 19799232221. The reversal of 19799232209 is 90223299791.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19799232209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19799232203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654602 + ... + 684179.

It is an arithmetic number, because the mean of its divisors is an integer number (2586526824).

Almost surely, 2^19799232209 is an apocalyptic number.

It is an amenable number.

19799232209 is a deficient number, since it is larger than the sum of its proper divisors (892982383).

19799232209 is a wasteful number, since it uses less digits than its factorization.

19799232209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339447.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 19799232209 in words is "nineteen billion, seven hundred ninety-nine million, two hundred thirty-two thousand, two hundred nine".