18025573 has 4 divisors (see below), whose sum is σ = 18146700. Its totient is φ = 17904448.

The previous prime is 18025543. The next prime is 18025577. The reversal of 18025573 is 37552081.

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 3448449 + 14577124 = 1857^2 + 3818^2 .

It is a cyclic number.

It is not a de Polignac number, because 18025573 - 2⁹ = 18025061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025577) 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, 60340 + ... + 60637.

It is an arithmetic number, because the mean of its divisors is an integer number (4536675).

Almost surely, 2^18025573 is an apocalyptic number.

It is an amenable number.

18025573 is a deficient number, since it is larger than the sum of its proper divisors (121127).

18025573 is a wasteful number, since it uses less digits than its factorization.

18025573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121126.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 18025573 is about 4245.6534243859. The cubic root of 18025573 is about 262.1981922092.

The spelling of 18025573 in words is "eighteen million, twenty-five thousand, five hundred seventy-three".