18474273 has 6 divisors (see below), whose sum is σ = 26685074. Its totient is φ = 12316176.

The previous prime is 18474259. The next prime is 18474283. The reversal of 18474273 is 37247481.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 1557504 = 4113^2 + 1248^2 .

It is not a de Polignac number, because 18474273 - 2⁸ = 18474017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18474283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1026340 + ... + 1026357.

Almost surely, 2^18474273 is an apocalyptic number.

It is an amenable number.

18474273 is a deficient number, since it is larger than the sum of its proper divisors (8210801).

18474273 is a wasteful number, since it uses less digits than its factorization.

18474273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052703 (or 2052700 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 18474273 is about 4298.1708900415. The cubic root of 18474273 is about 264.3559678132.

The spelling of 18474273 in words is "eighteen million, four hundred seventy-four thousand, two hundred seventy-three".