18946224 has 120 divisors (see below), whose sum is σ = 60121152. Its totient is φ = 5728320.

The previous prime is 18946171. The next prime is 18946237. The reversal of 18946224 is 42264981.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42547 + ... + 42989.

Almost surely, 2^18946224 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 18946224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30060576).

18946224 is an abundant number, since it is smaller than the sum of its proper divisors (41174928).

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

18946224 is a wasteful number, since it uses less digits than its factorization.

18946224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 459 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18946224 is about 4352.7260423785. The cubic root of 18946224 is about 266.5881796793.

It can be divided in two parts, 1894 and 6224, that added together give a palindrome (8118).

The spelling of 18946224 in words is "eighteen million, nine hundred forty-six thousand, two hundred twenty-four".