20500485 has 16 divisors (see below), whose sum is σ = 32907840. Its totient is φ = 10897920.

The previous prime is 20500483. The next prime is 20500511. The reversal of 20500485 is 58400502.

It is not a de Polignac number, because 20500485 - 2¹ = 20500483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500483) 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, 2901 + ... + 7029.

It is an arithmetic number, because the mean of its divisors is an integer number (2056740).

Almost surely, 2^20500485 is an apocalyptic number.

It is an amenable number.

20500485 is a deficient number, since it is larger than the sum of its proper divisors (12407355).

20500485 is a wasteful number, since it uses less digits than its factorization.

20500485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 20500485 is about 4527.7461280421. The cubic root of 20500485 is about 273.6873420532.

Adding to 20500485 its reverse (58400502), we get a palindrome (78900987).

The spelling of 20500485 in words is "twenty million, five hundred thousand, four hundred eighty-five".