20563360 has 24 divisors (see below), whose sum is σ = 48581316. Its totient is φ = 8225280.

The previous prime is 20563351. The next prime is 20563363. The reversal of 20563360 is 6336502.

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 24336 = 4532^2 + 156^2 .

It is not an unprimeable number, because it can be changed into a prime (20563363) 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 3 ways as a sum of consecutive naturals, for example, 64101 + ... + 64420.

Almost surely, 2^20563360 is an apocalyptic number.

20563360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20563360 is an abundant number, since it is smaller than the sum of its proper divisors (28017956).

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

20563360 is a wasteful number, since it uses less digits than its factorization.

20563360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128536 (or 128528 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 20563360 is about 4534.6841124824. The cubic root of 20563360 is about 273.9668562393.

Adding to 20563360 its reverse (6336502), we get a palindrome (26899862).

The spelling of 20563360 in words is "twenty million, five hundred sixty-three thousand, three hundred sixty".