18269581133 has 2 divisors, whose sum is σ = 18269581134. Its totient is φ = 18269581132.

The previous prime is 18269581111. The next prime is 18269581139. The reversal of 18269581133 is 33118596281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17614067524 + 655513609 = 132718^2 + 25603^2 .

It is a cyclic number.

It is not a de Polignac number, because 18269581133 - 2¹² = 18269577037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18269581139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9134790566 + 9134790567.

It is an arithmetic number, because the mean of its divisors is an integer number (9134790567).

Almost surely, 2^18269581133 is an apocalyptic number.

It is an amenable number.

18269581133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18269581133 is an equidigital number, since it uses as much as digits as its factorization.

18269581133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The spelling of 18269581133 in words is "eighteen billion, two hundred sixty-nine million, five hundred eighty-one thousand, one hundred thirty-three".