20239224 has 16 divisors (see below), whose sum is σ = 50598120. Its totient is φ = 6746400.

The previous prime is 20239181. The next prime is 20239253. The reversal of 20239224 is 42293202.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 843301 = 20239224 / (2 + 0 + 2 + 3 + 9 + 2 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20239194 and 20239203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421627 + ... + 421674.

Almost surely, 2^20239224 is an apocalyptic number.

20239224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20239224 is an abundant number, since it is smaller than the sum of its proper divisors (30358896).

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

20239224 is a wasteful number, since it uses less digits than its factorization.

20239224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843310 (or 843306 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20239224 is about 4498.8025073346. The cubic root of 20239224 is about 272.5197314781.

The spelling of 20239224 in words is "twenty million, two hundred thirty-nine thousand, two hundred twenty-four".