18535129 has 2 divisors, whose sum is σ = 18535130. Its totient is φ = 18535128.

The previous prime is 18535109. The next prime is 18535133. The reversal of 18535129 is 92153581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18079504 + 455625 = 4252^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 18535129 - 2⁹ = 18534617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18535094 and 18535103.

It is not a weakly prime, because it can be changed into another prime (18535109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9267564 + 9267565.

It is an arithmetic number, because the mean of its divisors is an integer number (9267565).

Almost surely, 2^18535129 is an apocalyptic number.

It is an amenable number.

18535129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18535129 is an equidigital number, since it uses as much as digits as its factorization.

18535129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 18535129 is about 4305.2443600799. The cubic root of 18535129 is about 264.6459208431.

The spelling of 18535129 in words is "eighteen million, five hundred thirty-five thousand, one hundred twenty-nine".