18780660841 has 2 divisors, whose sum is σ = 18780660842. Its totient is φ = 18780660840.

The previous prime is 18780660803. The next prime is 18780660881. The reversal of 18780660841 is 14806608781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18576599616 + 204061225 = 136296^2 + 14285^2 .

It is a cyclic number.

It is not a de Polignac number, because 18780660841 - 2⁹ = 18780660329 is a prime.

It is not a weakly prime, because it can be changed into another prime (18780660881) 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, 9390330420 + 9390330421.

It is an arithmetic number, because the mean of its divisors is an integer number (9390330421).

Almost surely, 2^18780660841 is an apocalyptic number.

It is an amenable number.

18780660841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18780660841 is an equidigital number, since it uses as much as digits as its factorization.

18780660841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 18780660841 in words is "eighteen billion, seven hundred eighty million, six hundred sixty thousand, eight hundred forty-one".