20055656 has 8 divisors (see below), whose sum is σ = 37604370. Its totient is φ = 10027824.

The previous prime is 20055649. The next prime is 20055661. The reversal of 20055656 is 65655002.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 8940100 = 3334^2 + 2990^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253471 + ... + 1253486.

Almost surely, 2^20055656 is an apocalyptic number.

It is an amenable number.

20055656 is a deficient number, since it is larger than the sum of its proper divisors (17548714).

20055656 is a wasteful number, since it uses less digits than its factorization.

20055656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506963 (or 2506959 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 20055656 is about 4478.3541619662. The cubic root of 20055656 is about 271.6933178382.

The spelling of 20055656 in words is "twenty million, fifty-five thousand, six hundred fifty-six".