18258343109 has 2 divisors, whose sum is σ = 18258343110. Its totient is φ = 18258343108.

The previous prime is 18258343063. The next prime is 18258343177. The reversal of 18258343109 is 90134385281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18252820609 + 5522500 = 135103^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 18258343109 - 2²⁸ = 17989907653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18258343109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18258343199) 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, 9129171554 + 9129171555.

It is an arithmetic number, because the mean of its divisors is an integer number (9129171555).

Almost surely, 2^18258343109 is an apocalyptic number.

It is an amenable number.

18258343109 is a deficient number, since it is larger than the sum of its proper divisors (1).

18258343109 is an equidigital number, since it uses as much as digits as its factorization.

18258343109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 18258343109 in words is "eighteen billion, two hundred fifty-eight million, three hundred forty-three thousand, one hundred nine".