20424472 has 16 divisors (see below), whose sum is σ = 38590200. Its totient is φ = 10133760.

The previous prime is 20424431. The next prime is 20424491. The reversal of 20424472 is 27442402.

It is a happy number.

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, 8697 + ... + 10792.

Almost surely, 2^20424472 is an apocalyptic number.

It is an amenable number.

20424472 is a deficient number, since it is larger than the sum of its proper divisors (18165728).

20424472 is a wasteful number, since it uses less digits than its factorization.

20424472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19626 (or 19622 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 20424472 is about 4519.3442002131. The cubic root of 20424472 is about 273.3486580079.

Adding to 20424472 its reverse (27442402), we get a palindrome (47866874).

The spelling of 20424472 in words is "twenty million, four hundred twenty-four thousand, four hundred seventy-two".