20315250 has 48 divisors (see below), whose sum is σ = 54938520. Its totient is φ = 5416800.

The previous prime is 20315227. The next prime is 20315263. The reversal of 20315250 is 5251302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13329801 + 6985449 = 3651^2 + 2643^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2265 + ... + 6764.

Almost surely, 2^20315250 is an apocalyptic number.

20315250 is an abundant number, since it is smaller than the sum of its proper divisors (34623270).

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

20315250 is a wasteful number, since it uses less digits than its factorization.

20315250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052 (or 9039 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20315250 is about 4507.2441691127. The cubic root of 20315250 is about 272.8605333601.

Adding to 20315250 its reverse (5251302), we get a palindrome (25566552).

The spelling of 20315250 in words is "twenty million, three hundred fifteen thousand, two hundred fifty".