18412224 has 56 divisors (see below), whose sum is σ = 51590448. Its totient is φ = 5775360.

The previous prime is 18412201. The next prime is 18412237. The reversal of 18412224 is 42221481.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18412194 and 18412203.

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, 444 + ... + 6084.

It is an arithmetic number, because the mean of its divisors is an integer number (921258).

Almost surely, 2^18412224 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 18412224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25795224).

18412224 is an abundant number, since it is smaller than the sum of its proper divisors (33178224).

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

18412224 is a wasteful number, since it uses less digits than its factorization.

18412224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5673 (or 5663 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 18412224 is about 4290.9467486791. The cubic root of 18412224 is about 264.0596742972.

The spelling of 18412224 in words is "eighteen million, four hundred twelve thousand, two hundred twenty-four".