11131818493 has 2 divisors, whose sum is σ = 11131818494. Its totient is φ = 11131818492.

The previous prime is 11131818487. The next prime is 11131818497. The reversal of 11131818493 is 39481813111.

11131818493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8861963044 + 2269855449 = 94138^2 + 47643^2 .

It is a cyclic number.

It is not a de Polignac number, because 11131818493 - 2⁹ = 11131817981 is a prime.

It is a super-2 number, since 2×11131818493² (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 (11131818497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565909246 + 5565909247.

It is an arithmetic number, because the mean of its divisors is an integer number (5565909247).

Almost surely, 2^11131818493 is an apocalyptic number.

It is an amenable number.

11131818493 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131818493 is an equidigital number, since it uses as much as digits as its factorization.

11131818493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 40.

The spelling of 11131818493 in words is "eleven billion, one hundred thirty-one million, eight hundred eighteen thousand, four hundred ninety-three".