20120056 has 16 divisors (see below), whose sum is σ = 41154840. Its totient is φ = 9145440.

The previous prime is 20120047. The next prime is 20120063. The reversal of 20120056 is 65002102.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 114231 + ... + 114406.

Almost surely, 2^20120056 is an apocalyptic number.

It is an amenable number.

20120056 is an abundant number, since it is smaller than the sum of its proper divisors (21034784).

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

20120056 is a wasteful number, since it uses less digits than its factorization.

20120056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228654 (or 228650 counting only the distinct ones).

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

The square root of 20120056 is about 4485.5385406883. The cubic root of 20120056 is about 271.9838153576.

Adding to 20120056 its reverse (65002102), we get a palindrome (85122158).

The spelling of 20120056 in words is "twenty million, one hundred twenty thousand, fifty-six".