20260056 has 96 divisors (see below), whose sum is σ = 56586240. Its totient is φ = 6031872.

The previous prime is 20260021. The next prime is 20260091. The reversal of 20260056 is 65006202.

It is an interprime number because it is at equal distance from previous prime (20260021) and next prime (20260091).

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 23 ways as a sum of consecutive naturals, for example, 159465 + ... + 159591.

It is an arithmetic number, because the mean of its divisors is an integer number (589440).

Almost surely, 2^20260056 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 20260056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28293120).

20260056 is an abundant number, since it is smaller than the sum of its proper divisors (36326184).

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

20260056 is a wasteful number, since it uses less digits than its factorization.

20260056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 172 counting only the distinct ones).

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

The square root of 20260056 is about 4501.1171946529. The cubic root of 20260056 is about 272.6131998897.

Adding to 20260056 its reverse (65006202), we get a palindrome (85266258).

The spelling of 20260056 in words is "twenty million, two hundred sixty thousand, fifty-six".