20305250 has 64 divisors (see below), whose sum is σ = 44658432. Its totient is φ = 6768000.

The previous prime is 20305247. The next prime is 20305277. The reversal of 20305250 is 5250302.

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 in 31 ways as a sum of consecutive naturals, for example, 71609 + ... + 71891.

It is an arithmetic number, because the mean of its divisors is an integer number (697788).

Almost surely, 2^20305250 is an apocalyptic number.

20305250 is an abundant number, since it is smaller than the sum of its proper divisors (24353182).

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

20305250 is a wasteful number, since it uses less digits than its factorization.

20305250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 20305250 is about 4506.1347072630. The cubic root of 20305250 is about 272.8157549602.

Adding to 20305250 its reverse (5250302), we get a palindrome (25555552).

The spelling of 20305250 in words is "twenty million, three hundred five thousand, two hundred fifty".