18996224 has 44 divisors (see below), whose sum is σ = 40923624. Its totient is φ = 8761344.

The previous prime is 18996223. The next prime is 18996233. The reversal of 18996224 is 42269981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18996221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12599 + ... + 14025.

Almost surely, 2^18996224 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 18996224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20461812).

18996224 is an abundant number, since it is smaller than the sum of its proper divisors (21927400).

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

18996224 is a wasteful number, since it uses less digits than its factorization.

18996224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1442 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 18996224 is about 4358.4657851129. The cubic root of 18996224 is about 266.8224867105.

The spelling of 18996224 in words is "eighteen million, nine hundred ninety-six thousand, two hundred twenty-four".