20560104 has 24 divisors (see below), whose sum is σ = 55683810. Its totient is φ = 6853344.

The previous prime is 20560093. The next prime is 20560121. The reversal of 20560104 is 40106502.

It is a happy number.

20560104 is a `hidden beast` number, since 2 + 0 + 560 + 104 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 39204 = 4530^2 + 198^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 142707 + ... + 142850.

Almost surely, 2^20560104 is an apocalyptic number.

20560104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20560104 is an abundant number, since it is smaller than the sum of its proper divisors (35123706).

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

20560104 is a wasteful number, since it uses less digits than its factorization.

20560104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285569 (or 285562 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20560104 is about 4534.3250875957. The cubic root of 20560104 is about 273.9523955161.

Adding to 20560104 its reverse (40106502), we get a palindrome (60666606).

The spelling of 20560104 in words is "twenty million, five hundred sixty thousand, one hundred four".