20201056 has 48 divisors (see below), whose sum is σ = 41613264. Its totient is φ = 9644544.

The previous prime is 20201053. The next prime is 20201063. The reversal of 20201056 is 65010202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201053) 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 7 ways as a sum of consecutive naturals, for example, 72790 + ... + 73066.

It is an arithmetic number, because the mean of its divisors is an integer number (866943).

Almost surely, 2^20201056 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 20201056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20806632).

20201056 is an abundant number, since it is smaller than the sum of its proper divisors (21412208).

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

20201056 is a wasteful number, since it uses less digits than its factorization.

20201056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20201056 is about 4494.5584877716. The cubic root of 20201056 is about 272.3483138631.

Adding to 20201056 its reverse (65010202), we get a palindrome (85211258).

The spelling of 20201056 in words is "twenty million, two hundred one thousand, fifty-six".