19503555113 has 6 divisors (see below), whose sum is σ = 22687809066. Its totient is φ = 16717332912.

The previous prime is 19503555101. The next prime is 19503555179. The reversal of 19503555113 is 31155530591.

It can be written as a sum of positive squares in only one way, i.e., 18739419664 + 764135449 = 136892^2 + 27643^2 .

It is not a de Polignac number, because 19503555113 - 2⁸ = 19503554857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19503555013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199015820 + ... + 199015917.

It is an arithmetic number, because the mean of its divisors is an integer number (3781301511).

Almost surely, 2^19503555113 is an apocalyptic number.

It is an amenable number.

19503555113 is a deficient number, since it is larger than the sum of its proper divisors (3184253953).

19503555113 is an equidigital number, since it uses as much as digits as its factorization.

19503555113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398031751 (or 398031744 counting only the distinct ones).

The product of its (nonzero) digits is 50625, while the sum is 38.

The spelling of 19503555113 in words is "nineteen billion, five hundred three million, five hundred fifty-five thousand, one hundred thirteen".