19983117313 has 4 divisors (see below), whose sum is σ = 21158594820. Its totient is φ = 18807639808.

The previous prime is 19983117311. The next prime is 19983117317. The reversal of 19983117313 is 31371138991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31371138991 = 191 ⋅164246801.

It can be written as a sum of positive squares in 2 ways, for example, as 17037558784 + 2945558529 = 130528^2 + 54273^2 .

It is a cyclic number.

It is not a de Polignac number, because 19983117313 - 2¹ = 19983117311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19983117311) 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, 587738728 + ... + 587738761.

It is an arithmetic number, because the mean of its divisors is an integer number (5289648705).

Almost surely, 2^19983117313 is an apocalyptic number.

It is an amenable number.

19983117313 is a deficient number, since it is larger than the sum of its proper divisors (1175477507).

19983117313 is a wasteful number, since it uses less digits than its factorization.

19983117313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175477506.

The product of its digits is 122472, while the sum is 46.

The spelling of 19983117313 in words is "nineteen billion, nine hundred eighty-three million, one hundred seventeen thousand, three hundred thirteen".