18650161393 has 2 divisors, whose sum is σ = 18650161394. Its totient is φ = 18650161392.

The previous prime is 18650161367. The next prime is 18650161403. The reversal of 18650161393 is 39316105681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17295406144 + 1354755249 = 131512^2 + 36807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18650161393 is a prime.

It is not a weakly prime, because it can be changed into another prime (18650161793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9325080696 + 9325080697.

It is an arithmetic number, because the mean of its divisors is an integer number (9325080697).

Almost surely, 2^18650161393 is an apocalyptic number.

It is an amenable number.

18650161393 is a deficient number, since it is larger than the sum of its proper divisors (1).

18650161393 is an equidigital number, since it uses as much as digits as its factorization.

18650161393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 18650161393 in words is "eighteen billion, six hundred fifty million, one hundred sixty-one thousand, three hundred ninety-three".