18365746648273 has 2 divisors, whose sum is σ = 18365746648274. Its totient is φ = 18365746648272.

The previous prime is 18365746648259. The next prime is 18365746648309. The reversal of 18365746648273 is 37284664756381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11796429075649 + 6569317572624 = 3434593^2 + 2563068^2 .

It is a cyclic number.

It is not a de Polignac number, because 18365746648273 - 2²⁹ = 18365209777361 is a prime.

It is not a weakly prime, because it can be changed into another prime (18365746648243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9182873324136 + 9182873324137.

It is an arithmetic number, because the mean of its divisors is an integer number (9182873324137).

Almost surely, 2^{18365746648273} is an apocalyptic number.

It is an amenable number.

18365746648273 is a deficient number, since it is larger than the sum of its proper divisors (1).

18365746648273 is an equidigital number, since it uses as much as digits as its factorization.

18365746648273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 975421440, while the sum is 70.

The spelling of 18365746648273 in words is "eighteen trillion, three hundred sixty-five billion, seven hundred forty-six million, six hundred forty-eight thousand, two hundred seventy-three".