19733872699 has 4 divisors (see below), whose sum is σ = 20011814640. Its totient is φ = 19455930760.

The previous prime is 19733872681. The next prime is 19733872733. The reversal of 19733872699 is 99627833791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99627833791 = 887 ⋅112319993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19733872699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19733872699.

It is not an unprimeable number, because it can be changed into a prime (19733872099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138970864 + ... + 138971005.

It is an arithmetic number, because the mean of its divisors is an integer number (5002953660).

Almost surely, 2^19733872699 is an apocalyptic number.

19733872699 is a deficient number, since it is larger than the sum of its proper divisors (277941941).

19733872699 is an equidigital number, since it uses as much as digits as its factorization.

19733872699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277941940.

The product of its digits is 30862944, while the sum is 64.

The spelling of 19733872699 in words is "nineteen billion, seven hundred thirty-three million, eight hundred seventy-two thousand, six hundred ninety-nine".