20125656 has 24 divisors (see below), whose sum is σ = 54507180. Its totient is φ = 6708528.

The previous prime is 20125649. The next prime is 20125697. The reversal of 20125656 is 65652102.

20125656 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 5 + 656 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139690 + ... + 139833.

Almost surely, 2^20125656 is an apocalyptic number.

It is an amenable number.

20125656 is an abundant number, since it is smaller than the sum of its proper divisors (34381524).

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

20125656 is a wasteful number, since it uses less digits than its factorization.

20125656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279535 (or 279528 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20125656 is about 4486.1627255373. The cubic root of 20125656 is about 272.0090467003.

Adding to 20125656 its reverse (65652102), we get a palindrome (85777758).

The spelling of 20125656 in words is "twenty million, one hundred twenty-five thousand, six hundred fifty-six".