20242785 has 16 divisors (see below), whose sum is σ = 32488704. Its totient is φ = 10762752.

The previous prime is 20242763. The next prime is 20242793. The reversal of 20242785 is 58724202.

It is not a de Polignac number, because 20242785 - 2⁹ = 20242273 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3384 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (2030544).

Almost surely, 2^20242785 is an apocalyptic number.

It is an amenable number.

20242785 is a deficient number, since it is larger than the sum of its proper divisors (12245919).

20242785 is a wasteful number, since it uses less digits than its factorization.

20242785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20242785 is about 4499.1982619129. The cubic root of 20242785 is about 272.5357134126.

Adding to 20242785 its reverse (58724202), we get a palindrome (78966987).

The spelling of 20242785 in words is "twenty million, two hundred forty-two thousand, seven hundred eighty-five".