18348642322957 has 2 divisors, whose sum is σ = 18348642322958. Its totient is φ = 18348642322956.

The previous prime is 18348642322949. The next prime is 18348642322973. The reversal of 18348642322957 is 75922324684381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14358180629961 + 3990461692996 = 3789219^2 + 1997614^2 .

It is a cyclic number.

It is not a de Polignac number, because 18348642322957 - 2³ = 18348642322949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18348642328957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174321161478 + 9174321161479.

It is an arithmetic number, because the mean of its divisors is an integer number (9174321161479).

Almost surely, 2^{18348642322957} is an apocalyptic number.

It is an amenable number.

18348642322957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18348642322957 is an equidigital number, since it uses as much as digits as its factorization.

18348642322957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139345920, while the sum is 64.

The spelling of 18348642322957 in words is "eighteen trillion, three hundred forty-eight billion, six hundred forty-two million, three hundred twenty-two thousand, nine hundred fifty-seven".