18073224 has 48 divisors (see below), whose sum is σ = 52716300. Its totient is φ = 5560704.

The previous prime is 18073213. The next prime is 18073259. The reversal of 18073224 is 42237081.

It can be written as a sum of positive squares in 2 ways, for example, as 15350724 + 2722500 = 3918^2 + 1650^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8719 + ... + 10590.

Almost surely, 2^18073224 is an apocalyptic number.

It is an amenable number.

18073224 is an abundant number, since it is smaller than the sum of its proper divisors (34643076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18073224 is a wasteful number, since it uses less digits than its factorization.

18073224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19334 (or 19327 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18073224 is about 4251.2614598493. The cubic root of 18073224 is about 262.4290311549.

The spelling of 18073224 in words is "eighteen million, seventy-three thousand, two hundred twenty-four".