20650245 has 64 divisors (see below), whose sum is σ = 43407360. Its totient is φ = 8121600.

The previous prime is 20650237. The next prime is 20650303. The reversal of 20650245 is 54205602.

It is not a de Polignac number, because 20650245 - 2³ = 20650237 is a prime.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 21475 + ... + 22415.

It is an arithmetic number, because the mean of its divisors is an integer number (678240).

Almost surely, 2^20650245 is an apocalyptic number.

It is an amenable number.

20650245 is an abundant number, since it is smaller than the sum of its proper divisors (22757115).

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

20650245 is a wasteful number, since it uses less digits than its factorization.

20650245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20650245 is about 4544.2540642002. The cubic root of 20650245 is about 274.3521720552.

Adding to 20650245 its reverse (54205602), we get a palindrome (74855847).

The spelling of 20650245 in words is "twenty million, six hundred fifty thousand, two hundred forty-five".