20424416 has 12 divisors (see below), whose sum is σ = 40210632. Its totient is φ = 10212192.

The previous prime is 20424409. The next prime is 20424421. The reversal of 20424416 is 61442402.

It is a junction number, because it is equal to n+sod(n) for n = 20424391 and 20424400.

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 as a sum of consecutive naturals, namely, 319100 + ... + 319163.

It is an arithmetic number, because the mean of its divisors is an integer number (3350886).

Almost surely, 2^20424416 is an apocalyptic number.

It is an amenable number.

20424416 is a deficient number, since it is larger than the sum of its proper divisors (19786216).

20424416 is an equidigital number, since it uses as much as digits as its factorization.

20424416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638273 (or 638265 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 20424416 is about 4519.3380046197. The cubic root of 20424416 is about 273.3484081844.

Adding to 20424416 its reverse (61442402), we get a palindrome (81866818).

The spelling of 20424416 in words is "twenty million, four hundred twenty-four thousand, four hundred sixteen".