20250656 has 36 divisors (see below), whose sum is σ = 42101262. Its totient is φ = 9586944.

The previous prime is 20250647. The next prime is 20250661. The reversal of 20250656 is 65605202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 144400 = 4484^2 + 380^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10676 + ... + 12428.

Almost surely, 2^20250656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20250656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21050631).

20250656 is an abundant number, since it is smaller than the sum of its proper divisors (21850606).

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

20250656 is a wasteful number, since it uses less digits than its factorization.

20250656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20250656 is about 4500.0728882986. The cubic root of 20250656 is about 272.5710321797.

Adding to 20250656 its reverse (65605202), we get a palindrome (85855858).

The spelling of 20250656 in words is "twenty million, two hundred fifty thousand, six hundred fifty-six".