20524424 has 16 divisors (see below), whose sum is σ = 38881500. Its totient is φ = 10156032.

The previous prime is 20524421. The next prime is 20524429. The reversal of 20524424 is 42442502.

It can be written as a sum of positive squares in 2 ways, for example, as 19201924 + 1322500 = 4382^2 + 1150^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20524424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524421) by changing a digit.

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, 12449 + ... + 14000.

Almost surely, 2^20524424 is an apocalyptic number.

It is an amenable number.

20524424 is a deficient number, since it is larger than the sum of its proper divisors (18357076).

20524424 is a wasteful number, since it uses less digits than its factorization.

20524424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26552 (or 26548 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 20524424 is about 4530.3889457750. The cubic root of 20524424 is about 273.7938314475.

Adding to 20524424 its reverse (42442502), we get a palindrome (62966926).

The spelling of 20524424 in words is "twenty million, five hundred twenty-four thousand, four hundred twenty-four".