20502250 has 16 divisors (see below), whose sum is σ = 38380680. Its totient is φ = 8200800.

The previous prime is 20502247. The next prime is 20502257. The reversal of 20502250 is 5220502.

It can be written as a sum of positive squares in 4 ways, for example, as 11923209 + 8579041 = 3453^2 + 2929^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40755 + ... + 41254.

Almost surely, 2^20502250 is an apocalyptic number.

20502250 is a deficient number, since it is larger than the sum of its proper divisors (17878430).

20502250 is an equidigital number, since it uses as much as digits as its factorization.

20502250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82026 (or 82016 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 20502250 is about 4527.9410331850. The cubic root of 20502250 is about 273.6951962462.

Adding to 20502250 its reverse (5220502), we get a palindrome (25722752).

The spelling of 20502250 in words is "twenty million, five hundred two thousand, two hundred fifty".