20601256 has 32 divisors (see below), whose sum is σ = 41990760. Its totient is φ = 9418752.

The previous prime is 20601247. The next prime is 20601271. The reversal of 20601256 is 65210602.

It can be written as a sum of positive squares in 4 ways, for example, as 2402500 + 18198756 = 1550^2 + 4266^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10876 + ... + 12628.

Almost surely, 2^20601256 is an apocalyptic number.

20601256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20601256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20995380).

20601256 is an abundant number, since it is smaller than the sum of its proper divisors (21389504).

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

20601256 is a wasteful number, since it uses less digits than its factorization.

20601256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20601256 is about 4538.8606499870. The cubic root of 20601256 is about 274.1350498407.

Adding to 20601256 its reverse (65210602), we get a palindrome (85811858).

The spelling of 20601256 in words is "twenty million, six hundred one thousand, two hundred fifty-six".