13813347181 has 2 divisors, whose sum is σ = 13813347182. Its totient is φ = 13813347180.

The previous prime is 13813347137. The next prime is 13813347227. The reversal of 13813347181 is 18174331831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13706555625 + 106791556 = 117075^2 + 10334^2 .

It is a cyclic number.

It is not a de Polignac number, because 13813347181 - 2¹³ = 13813338989 is a prime.

It is a super-2 number, since 2×13813347181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13813347131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6906673590 + 6906673591.

It is an arithmetic number, because the mean of its divisors is an integer number (6906673591).

Almost surely, 2^13813347181 is an apocalyptic number.

It is an amenable number.

13813347181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13813347181 is an equidigital number, since it uses as much as digits as its factorization.

13813347181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The spelling of 13813347181 in words is "thirteen billion, eight hundred thirteen million, three hundred forty-seven thousand, one hundred eighty-one".