19999200008 has 12 divisors (see below), whose sum is σ = 37499250015. Its totient is φ = 9999400008.

The previous prime is 19999199951. The next prime is 19999200017. The reversal of 19999200008 is 80000299991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 9999600004 + 9999600004 = 99998^2 + 99998^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99998.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 374993 + ... + 424991.

Almost surely, 2^19999200008 is an apocalyptic number.

It is an amenable number.

19999200008 is a deficient number, since it is larger than the sum of its proper divisors (17500050007).

19999200008 is an frugal number, since it uses more digits than its factorization.

19999200008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100004 (or 50001 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 47.

Adding to 19999200008 its reverse (80000299991), we get a palindrome (99999499999).

The spelling of 19999200008 in words is "nineteen billion, nine hundred ninety-nine million, two hundred thousand, eight".