20600256 has 56 divisors (see below), whose sum is σ = 57383680. Its totient is φ = 6504192.

The previous prime is 20600233. The next prime is 20600267. The reversal of 20600256 is 65200602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 825 + ... + 6471.

Almost surely, 2^20600256 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 20600256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28691840).

20600256 is an abundant number, since it is smaller than the sum of its proper divisors (36783424).

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

20600256 is a wasteful number, since it uses less digits than its factorization.

20600256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681 (or 5671 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20600256 is about 4538.7504888460. The cubic root of 20600256 is about 274.1306141971.

Adding to 20600256 its reverse (65200602), we get a palindrome (85800858).

The spelling of 20600256 in words is "twenty million, six hundred thousand, two hundred fifty-six".