20560120 has 64 divisors (see below), whose sum is σ = 53484480. Its totient is φ = 6967296.

The previous prime is 20560093. The next prime is 20560121. The reversal of 20560120 is 2106502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20560094 and 20560103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26782 + ... + 27538.

It is an arithmetic number, because the mean of its divisors is an integer number (835695).

Almost surely, 2^20560120 is an apocalyptic number.

20560120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20560120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26742240).

20560120 is an abundant number, since it is smaller than the sum of its proper divisors (32924360).

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

20560120 is a wasteful number, since it uses less digits than its factorization.

20560120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 868 counting only the distinct ones).

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

The square root of 20560120 is about 4534.3268519153. The cubic root of 20560120 is about 273.9524665799.

Adding to 20560120 its reverse (2106502), we get a palindrome (22666622).

The spelling of 20560120 in words is "twenty million, five hundred sixty thousand, one hundred twenty".