20886560 has 48 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 8083200.

The previous prime is 20886559. The next prime is 20886563. The reversal of 20886560 is 6568802.

It is a self number, because there is not a number n which added to its sum of digits gives 20886560.

It is not an unprimeable number, because it can be changed into a prime (20886563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (1061424).

Almost surely, 2^20886560 is an apocalyptic number.

20886560 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 20886560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25474176).

20886560 is an abundant number, since it is smaller than the sum of its proper divisors (30061792).

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

20886560 is a wasteful number, since it uses less digits than its factorization.

20886560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257 (or 4249 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 20886560 is about 4570.1816156472. The cubic root of 20886560 is about 275.3947389002.

It can be divided in two parts, 208 and 86560, that added together give a palindrome (86768).

The spelling of 20886560 in words is "twenty million, eight hundred eighty-six thousand, five hundred sixty".