18834526309 has 2 divisors, whose sum is σ = 18834526310. Its totient is φ = 18834526308.

The previous prime is 18834526303. The next prime is 18834526357. The reversal of 18834526309 is 90362543881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9965030625 + 8869495684 = 99825^2 + 94178^2 .

It is a cyclic number.

It is not a de Polignac number, because 18834526309 - 2⁹ = 18834525797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18834526303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9417263154 + 9417263155.

It is an arithmetic number, because the mean of its divisors is an integer number (9417263155).

Almost surely, 2^18834526309 is an apocalyptic number.

It is an amenable number.

18834526309 is a deficient number, since it is larger than the sum of its proper divisors (1).

18834526309 is an equidigital number, since it uses as much as digits as its factorization.

18834526309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 18834526309 in words is "eighteen billion, eight hundred thirty-four million, five hundred twenty-six thousand, three hundred nine".