18813043251325 has 6 divisors (see below), whose sum is σ = 23328173631674. Its totient is φ = 15050434601040.

The previous prime is 18813043251319. The next prime is 18813043251341. The reversal of 18813043251325 is 52315234031881.

It can be written as a sum of positive squares in 3 ways, for example, as 4086276274116 + 14726766977209 = 2021454^2 + 3837547^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18813043251325 is a prime.

It is a super-2 number, since 2×18813043251325² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376260865002 + ... + 376260865051.

Almost surely, 2^{18813043251325} is an apocalyptic number.

It is an amenable number.

18813043251325 is a deficient number, since it is larger than the sum of its proper divisors (4515130380349).

18813043251325 is an equidigital number, since it uses as much as digits as its factorization.

18813043251325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752521730063 (or 752521730058 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 18813043251325 in words is "eighteen trillion, eight hundred thirteen billion, forty-three million, two hundred fifty-one thousand, three hundred twenty-five".