20424305 has 16 divisors (see below), whose sum is σ = 27108864. Its totient is φ = 14647680.

The previous prime is 20424301. The next prime is 20424307. The reversal of 20424305 is 50342402.

It is not a de Polignac number, because 20424305 - 2² = 20424301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1472 + ... + 6558.

It is an arithmetic number, because the mean of its divisors is an integer number (1694304).

Almost surely, 2^20424305 is an apocalyptic number.

It is an amenable number.

20424305 is a deficient number, since it is larger than the sum of its proper divisors (6684559).

20424305 is a wasteful number, since it uses less digits than its factorization.

20424305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20424305 is about 4519.3257240434. The cubic root of 20424305 is about 273.3479129972.

Adding to 20424305 its reverse (50342402), we get a palindrome (70766707).

The spelling of 20424305 in words is "twenty million, four hundred twenty-four thousand, three hundred five".