18075020393 has 2 divisors, whose sum is σ = 18075020394. Its totient is φ = 18075020392.

The previous prime is 18075020389. The next prime is 18075020401. The reversal of 18075020393 is 39302057081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14813810944 + 3261209449 = 121712^2 + 57107^2 .

It is a cyclic number.

It is not a de Polignac number, because 18075020393 - 2² = 18075020389 is a prime.

It is not a weakly prime, because it can be changed into another prime (18075020333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037510196 + 9037510197.

It is an arithmetic number, because the mean of its divisors is an integer number (9037510197).

Almost surely, 2^18075020393 is an apocalyptic number.

It is an amenable number.

18075020393 is a deficient number, since it is larger than the sum of its proper divisors (1).

18075020393 is an equidigital number, since it uses as much as digits as its factorization.

18075020393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 18075020393 in words is "eighteen billion, seventy-five million, twenty thousand, three hundred ninety-three".