20236224 has 28 divisors (see below), whose sum is σ = 53542184. Its totient is φ = 6745344.

The previous prime is 20236199. The next prime is 20236253. The reversal of 20236224 is 42263202.

It is a self number, because there is not a number n which added to its sum of digits gives 20236224.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52507 + ... + 52890.

Almost surely, 2^20236224 is an apocalyptic number.

20236224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20236224 is an abundant number, since it is smaller than the sum of its proper divisors (33305960).

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

20236224 is a wasteful number, since it uses less digits than its factorization.

20236224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105412 (or 105402 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20236224 is about 4498.4690729180. The cubic root of 20236224 is about 272.5062658829.

Adding to 20236224 its reverse (42263202), we get a palindrome (62499426).

The spelling of 20236224 in words is "twenty million, two hundred thirty-six thousand, two hundred twenty-four".