18455028173 has 2 divisors, whose sum is σ = 18455028174. Its totient is φ = 18455028172.

The previous prime is 18455028161. The next prime is 18455028223. The reversal of 18455028173 is 37182055481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17465736964 + 989291209 = 132158^2 + 31453^2 .

It is a cyclic number.

It is not a de Polignac number, because 18455028173 - 2²⁸ = 18186592717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18455028973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9227514086 + 9227514087.

It is an arithmetic number, because the mean of its divisors is an integer number (9227514087).

Almost surely, 2^18455028173 is an apocalyptic number.

It is an amenable number.

18455028173 is a deficient number, since it is larger than the sum of its proper divisors (1).

18455028173 is an equidigital number, since it uses as much as digits as its factorization.

18455028173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 18455028173 in words is "eighteen billion, four hundred fifty-five million, twenty-eight thousand, one hundred seventy-three".