18903076965497 has 2 divisors, whose sum is σ = 18903076965498. Its totient is φ = 18903076965496.

The previous prime is 18903076965449. The next prime is 18903076965523. The reversal of 18903076965497 is 79456967030981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17443452959296 + 1459624006201 = 4176536^2 + 1208149^2 .

It is a cyclic number.

It is not a de Polignac number, because 18903076965497 - 2⁴⁰ = 17803565337721 is a prime.

It is not a weakly prime, because it can be changed into another prime (18903076965197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9451538482748 + 9451538482749.

It is an arithmetic number, because the mean of its divisors is an integer number (9451538482749).

Almost surely, 2^{18903076965497} is an apocalyptic number.

It is an amenable number.

18903076965497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18903076965497 is an equidigital number, since it uses as much as digits as its factorization.

18903076965497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617258880, while the sum is 74.

The spelling of 18903076965497 in words is "eighteen trillion, nine hundred three billion, seventy-six million, nine hundred sixty-five thousand, four hundred ninety-seven".