20424516 has 24 divisors (see below), whose sum is σ = 54465600. Its totient is φ = 5835552.

The previous prime is 20424511. The next prime is 20424517. The reversal of 20424516 is 61542402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 121491 + ... + 121658.

It is an arithmetic number, because the mean of its divisors is an integer number (2269400).

Almost surely, 2^20424516 is an apocalyptic number.

It is an amenable number.

20424516 is an abundant number, since it is smaller than the sum of its proper divisors (34041084).

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

20424516 is a wasteful number, since it uses less digits than its factorization.

20424516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243163 (or 243161 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20424516 is about 4519.3490681734. The cubic root of 20424516 is about 273.3488542974.

Adding to 20424516 its reverse (61542402), we get a palindrome (81966918).

The spelling of 20424516 in words is "twenty million, four hundred twenty-four thousand, five hundred sixteen".