17848909109 has 2 divisors, whose sum is σ = 17848909110. Its totient is φ = 17848909108.

The previous prime is 17848909079. The next prime is 17848909123. The reversal of 17848909109 is 90190984871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11465698084 + 6383211025 = 107078^2 + 79895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17848909109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17848909129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8924454554 + 8924454555.

It is an arithmetic number, because the mean of its divisors is an integer number (8924454555).

Almost surely, 2^17848909109 is an apocalyptic number.

It is an amenable number.

17848909109 is a deficient number, since it is larger than the sum of its proper divisors (1).

17848909109 is an equidigital number, since it uses as much as digits as its factorization.

17848909109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 56.

The spelling of 17848909109 in words is "seventeen billion, eight hundred forty-eight million, nine hundred nine thousand, one hundred nine".