18889266658723 has 2 divisors, whose sum is σ = 18889266658724. Its totient is φ = 18889266658722.

The previous prime is 18889266658631. The next prime is 18889266658753. The reversal of 18889266658723 is 32785666298881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18889266658723 - 2³⁷ = 18751827705251 is a prime.

It is not a weakly prime, because it can be changed into another prime (18889266658753) 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, 9444633329361 + 9444633329362.

It is an arithmetic number, because the mean of its divisors is an integer number (9444633329362).

Almost surely, 2^{18889266658723} is an apocalyptic number.

18889266658723 is a deficient number, since it is larger than the sum of its proper divisors (1).

18889266658723 is an equidigital number, since it uses as much as digits as its factorization.

18889266658723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3344302080, while the sum is 79.

The spelling of 18889266658723 in words is "eighteen trillion, eight hundred eighty-nine billion, two hundred sixty-six million, six hundred fifty-eight thousand, seven hundred twenty-three".