20477056 has 16 divisors (see below), whose sum is σ = 40794390. Its totient is φ = 10238464.

The previous prime is 20477053. The next prime is 20477057. The reversal of 20477056 is 65077402.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 46656 = 4520^2 + 216^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (20477053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79861 + ... + 80116.

Almost surely, 2^20477056 is an apocalyptic number.

It is an amenable number.

20477056 is a deficient number, since it is larger than the sum of its proper divisors (20317334).

20477056 is an equidigital number, since it uses as much as digits as its factorization.

20477056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159991 (or 159979 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20477056 is about 4525.1581187844. The cubic root of 20477056 is about 273.5830410245.

The spelling of 20477056 in words is "twenty million, four hundred seventy-seven thousand, fifty-six".