18485457273 has 6 divisors (see below), whose sum is σ = 26701216074. Its totient is φ = 12323638176.

The previous prime is 18485457233. The next prime is 18485457283. The reversal of 18485457273 is 37275458481.

18485457273 is a `hidden beast` number, since 18 + 4 + 8 + 54 + 572 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12564616464 + 5920840809 = 112092^2 + 76947^2 .

It is not a de Polignac number, because 18485457273 - 2⁶ = 18485457209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18485457223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1026969840 + ... + 1026969857.

It is an arithmetic number, because the mean of its divisors is an integer number (4450202679).

Almost surely, 2^18485457273 is an apocalyptic number.

It is an amenable number.

18485457273 is a deficient number, since it is larger than the sum of its proper divisors (8215758801).

18485457273 is a wasteful number, since it uses less digits than its factorization.

18485457273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053939703 (or 2053939700 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 18485457273 in words is "eighteen billion, four hundred eighty-five million, four hundred fifty-seven thousand, two hundred seventy-three".