18228573 has 24 divisors (see below), whose sum is σ = 30416256. Its totient is φ = 10396800.

The previous prime is 18228563. The next prime is 18228577. The reversal of 18228573 is 37582281.

18228573 is a `hidden beast` number, since 1 + 82 + 2 + 8 + 573 = 666.

It is not a de Polignac number, because 18228573 - 2⁴ = 18228557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18228577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3733 + ... + 7098.

It is an arithmetic number, because the mean of its divisors is an integer number (1267344).

Almost surely, 2^18228573 is an apocalyptic number.

It is an amenable number.

18228573 is a deficient number, since it is larger than the sum of its proper divisors (12187683).

18228573 is a wasteful number, since it uses less digits than its factorization.

18228573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10865 (or 10862 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18228573 is about 4269.4932954626. The cubic root of 18228573 is about 263.1787928716.

The spelling of 18228573 in words is "eighteen million, two hundred twenty-eight thousand, five hundred seventy-three".