19999600001 has 4 divisors (see below), whose sum is σ = 20018961732. Its totient is φ = 19980238272.

The previous prime is 19999599967. The next prime is 19999600007. The reversal of 19999600001 is 10000699991.

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: 10000699991 = 229 ⋅43671179.

It can be written as a sum of positive squares in 2 ways, for example, as 17141093776 + 2858506225 = 130924^2 + 53465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19999600001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19999600007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9679316 + ... + 9681381.

It is an arithmetic number, because the mean of its divisors is an integer number (5004740433).

Almost surely, 2^19999600001 is an apocalyptic number.

It is an amenable number.

19999600001 is a deficient number, since it is larger than the sum of its proper divisors (19361731).

19999600001 is a wasteful number, since it uses less digits than its factorization.

19999600001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19361730.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 19999600001 in words is "nineteen billion, nine hundred ninety-nine million, six hundred thousand, one".