20012056 has 8 divisors (see below), whose sum is σ = 37522620. Its totient is φ = 10006024.

The previous prime is 20012053. The next prime is 20012063. The reversal of 20012056 is 65021002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250746 + ... + 1250761.

Almost surely, 2^20012056 is an apocalyptic number.

It is an amenable number.

20012056 is a deficient number, since it is larger than the sum of its proper divisors (17510564).

20012056 is a wasteful number, since it uses less digits than its factorization.

20012056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501513 (or 2501509 counting only the distinct ones).

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

The square root of 20012056 is about 4473.4836537088. The cubic root of 20012056 is about 271.4962924019.

Adding to 20012056 its reverse (65021002), we get a palindrome (85033058).

The spelling of 20012056 in words is "twenty million, twelve thousand, fifty-six".