20006056 has 64 divisors (see below), whose sum is σ = 45158400. Its totient is φ = 8128512.

The previous prime is 20006053. The next prime is 20006057. The reversal of 20006056 is 65060002.

It is not an unprimeable number, because it can be changed into a prime (20006053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157465 + ... + 157591.

It is an arithmetic number, because the mean of its divisors is an integer number (705600).

Almost surely, 2^20006056 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 20006056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22579200).

20006056 is an abundant number, since it is smaller than the sum of its proper divisors (25152344).

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

20006056 is a wasteful number, since it uses less digits than its factorization.

20006056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20006056 is about 4472.8129851359. The cubic root of 20006056 is about 271.4691564164.

Adding to 20006056 its reverse (65060002), we get a palindrome (85066058).

The spelling of 20006056 in words is "twenty million, six thousand, fifty-six".