18125473 has 4 divisors (see below), whose sum is σ = 18329220. Its totient is φ = 17921728.

The previous prime is 18125467. The next prime is 18125477. The reversal of 18125473 is 37452181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12446784 + 5678689 = 3528^2 + 2383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18125473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18125477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101740 + ... + 101917.

It is an arithmetic number, because the mean of its divisors is an integer number (4582305).

Almost surely, 2^18125473 is an apocalyptic number.

It is an amenable number.

18125473 is a deficient number, since it is larger than the sum of its proper divisors (203747).

18125473 is an equidigital number, since it uses as much as digits as its factorization.

18125473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203746.

The product of its digits is 6720, while the sum is 31.

The square root of 18125473 is about 4257.4021421519. The cubic root of 18125473 is about 262.6816786136.

The spelling of 18125473 in words is "eighteen million, one hundred twenty-five thousand, four hundred seventy-three".