20512250 has 32 divisors (see below), whose sum is σ = 41895360. Its totient is φ = 7458000.

The previous prime is 20512249. The next prime is 20512253. The reversal of 20512250 is 5221502.

It is not an unprimeable number, because it can be changed into a prime (20512253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980 + ... + 6479.

It is an arithmetic number, because the mean of its divisors is an integer number (1309230).

Almost surely, 2^20512250 is an apocalyptic number.

20512250 is an abundant number, since it is smaller than the sum of its proper divisors (21383110).

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

20512250 is a wasteful number, since it uses less digits than its factorization.

20512250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487 (or 7477 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20512250 is about 4529.0451532304. The cubic root of 20512250 is about 273.7396874134.

Adding to 20512250 its reverse (5221502), we get a palindrome (25733752).

The spelling of 20512250 in words is "twenty million, five hundred twelve thousand, two hundred fifty".