18855350273 has 2 divisors, whose sum is σ = 18855350274. Its totient is φ = 18855350272.

The previous prime is 18855350221. The next prime is 18855350279. The reversal of 18855350273 is 37205355881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12393923584 + 6461426689 = 111328^2 + 80383^2 .

It is a cyclic number.

It is not a de Polignac number, because 18855350273 - 2⁶ = 18855350209 is a prime.

It is not a weakly prime, because it can be changed into another prime (18855350279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9427675136 + 9427675137.

It is an arithmetic number, because the mean of its divisors is an integer number (9427675137).

Almost surely, 2^18855350273 is an apocalyptic number.

It is an amenable number.

18855350273 is a deficient number, since it is larger than the sum of its proper divisors (1).

18855350273 is an equidigital number, since it uses as much as digits as its factorization.

18855350273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 18855350273 in words is "eighteen billion, eight hundred fifty-five million, three hundred fifty thousand, two hundred seventy-three".