18960877289 has 2 divisors, whose sum is σ = 18960877290. Its totient is φ = 18960877288.

The previous prime is 18960877279. The next prime is 18960877297. The reversal of 18960877289 is 98277806981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15032721664 + 3928155625 = 122608^2 + 62675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18960877289 is a prime.

It is not a weakly prime, because it can be changed into another prime (18960877279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9480438644 + 9480438645.

It is an arithmetic number, because the mean of its divisors is an integer number (9480438645).

Almost surely, 2^18960877289 is an apocalyptic number.

It is an amenable number.

18960877289 is a deficient number, since it is larger than the sum of its proper divisors (1).

18960877289 is an equidigital number, since it uses as much as digits as its factorization.

18960877289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 65.

The spelling of 18960877289 in words is "eighteen billion, nine hundred sixty million, eight hundred seventy-seven thousand, two hundred eighty-nine".