20560518 has 24 divisors (see below), whose sum is σ = 48598056. Its totient is φ = 6230400.

The previous prime is 20560517. The next prime is 20560537. The reversal of 20560518 is 81506502.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20560491 and 20560500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560517) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 51723 + ... + 52118.

It is an arithmetic number, because the mean of its divisors is an integer number (2024919).

Almost surely, 2^20560518 is an apocalyptic number.

20560518 is an abundant number, since it is smaller than the sum of its proper divisors (28037538).

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

20560518 is a wasteful number, since it uses less digits than its factorization.

20560518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103860 (or 103857 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 20560518 is about 4534.3707391434. The cubic root of 20560518 is about 273.9542342800.

The spelling of 20560518 in words is "twenty million, five hundred sixty thousand, five hundred eighteen".