18041389013 has 2 divisors, whose sum is σ = 18041389014. Its totient is φ = 18041389012.

The previous prime is 18041389007. The next prime is 18041389031. The reversal of 18041389013 is 31098314081.

Together with next prime (18041389031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16337185489 + 1704203524 = 127817^2 + 41282^2 .

It is a cyclic number.

It is not a de Polignac number, because 18041389013 - 2¹⁶ = 18041323477 is a prime.

It is a super-2 number, since 2×18041389013² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18041389913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020694506 + 9020694507.

It is an arithmetic number, because the mean of its divisors is an integer number (9020694507).

Almost surely, 2^18041389013 is an apocalyptic number.

It is an amenable number.

18041389013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041389013 is an equidigital number, since it uses as much as digits as its factorization.

18041389013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 18041389013 in words is "eighteen billion, forty-one million, three hundred eighty-nine thousand, thirteen".