18450224 has 40 divisors (see below), whose sum is σ = 38903760. Its totient is φ = 8425728.

The previous prime is 18450203. The next prime is 18450233. The reversal of 18450224 is 42205481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 18450193 and 18450202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21842 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (972594).

Almost surely, 2^18450224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18450224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19451880).

18450224 is an abundant number, since it is smaller than the sum of its proper divisors (20453536).

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

18450224 is a wasteful number, since it uses less digits than its factorization.

18450224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 18450224 is about 4295.3723936348. The cubic root of 18450224 is about 264.2412089933.

The spelling of 18450224 in words is "eighteen million, four hundred fifty thousand, two hundred twenty-four".