20000056 has 16 divisors (see below), whose sum is σ = 38136600. Its totient is φ = 9830304.

The previous prime is 20000047. The next prime is 20000059. The reversal of 20000056 is 65000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000059) 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 3 ways as a sum of consecutive naturals, for example, 20715 + ... + 21658.

Almost surely, 2^20000056 is an apocalyptic number.

It is an amenable number.

20000056 is a deficient number, since it is larger than the sum of its proper divisors (18136544).

20000056 is a wasteful number, since it uses less digits than its factorization.

20000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42438 (or 42434 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20000056 is about 4472.1422159855. The cubic root of 20000056 is about 271.4420150049.

Adding to 20000056 its reverse (65000002), we get a palindrome (85000058).

The spelling of 20000056 in words is "twenty million, fifty-six", and thus it is an aban number and an uban number.