18903076965449 has 2 divisors, whose sum is σ = 18903076965450. Its totient is φ = 18903076965448.

The previous prime is 18903076965439. The next prime is 18903076965497. The reversal of 18903076965449 is 94456967030981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12601506019600 + 6301570945849 = 3549860^2 + 2510293^2 .

It is a cyclic number.

It is not a de Polignac number, because 18903076965449 - 2¹⁶ = 18903076899913 is a prime.

It is not a weakly prime, because it can be changed into another prime (18903076965419) 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, 9451538482724 + 9451538482725.

It is an arithmetic number, because the mean of its divisors is an integer number (9451538482725).

Almost surely, 2^{18903076965449} is an apocalyptic number.

It is an amenable number.

18903076965449 is a deficient number, since it is larger than the sum of its proper divisors (1).

18903076965449 is an equidigital number, since it uses as much as digits as its factorization.

18903076965449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352719360, while the sum is 71.

The spelling of 18903076965449 in words is "eighteen trillion, nine hundred three billion, seventy-six million, nine hundred sixty-five thousand, four hundred forty-nine".