13018319653 has 4 divisors (see below), whose sum is σ = 13784103180. Its totient is φ = 12252536128.

The previous prime is 13018319627. The next prime is 13018319681. The reversal of 13018319653 is 35691381031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4305590689 + 8712728964 = 65617^2 + 93342^2 .

It is a cyclic number.

It is not a de Polignac number, because 13018319653 - 2⁵ = 13018319621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13013319653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382891738 + ... + 382891771.

It is an arithmetic number, because the mean of its divisors is an integer number (3446025795).

Almost surely, 2^13018319653 is an apocalyptic number.

It is an amenable number.

13018319653 is a deficient number, since it is larger than the sum of its proper divisors (765783527).

13018319653 is an equidigital number, since it uses as much as digits as its factorization.

13018319653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765783526.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 13018319653 in words is "thirteen billion, eighteen million, three hundred nineteen thousand, six hundred fifty-three".