20126250 has 60 divisors (see below), whose sum is σ = 54521610. Its totient is φ = 5364000.

The previous prime is 20126237. The next prime is 20126251. The reversal of 20126250 is 5262102.

It can be written as a sum of positive squares in 5 ways, for example, as 2812329 + 17313921 = 1677^2 + 4161^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20126251) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 10356 + ... + 12144.

Almost surely, 2^20126250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20126250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27260805).

20126250 is an abundant number, since it is smaller than the sum of its proper divisors (34395360).

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

20126250 is a wasteful number, since it uses less digits than its factorization.

20126250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20126250 is about 4486.2289286215. The cubic root of 20126250 is about 272.0117227502.

Adding to 20126250 its reverse (5262102), we get a palindrome (25388352).

The spelling of 20126250 in words is "twenty million, one hundred twenty-six thousand, two hundred fifty".