20206250 has 48 divisors (see below), whose sum is σ = 39231864. Its totient is φ = 7800000.

The previous prime is 20206247. The next prime is 20206271. The reversal of 20206250 is 5260202.

It can be written as a sum of positive squares in 12 ways, for example, as 13082689 + 7123561 = 3617^2 + 2669^2 .

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 23 ways as a sum of consecutive naturals, for example, 331220 + ... + 331280.

Almost surely, 2^20206250 is an apocalyptic number.

20206250 is a deficient number, since it is larger than the sum of its proper divisors (19025614).

20206250 is an frugal number, since it uses more digits than its factorization.

20206250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20206250 is about 4495.1362604486. The cubic root of 20206250 is about 272.3716534998.

Adding to 20206250 its reverse (5260202), we get a palindrome (25466452).

The spelling of 20206250 in words is "twenty million, two hundred six thousand, two hundred fifty".