11820563 has 2 divisors, whose sum is σ = 11820564. Its totient is φ = 11820562.

The previous prime is 11820539. The next prime is 11820581. The reversal of 11820563 is 36502811.

11820563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (36502811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11820563 - 2¹⁴ = 11804179 is a prime.

It is not a weakly prime, because it can be changed into another prime (11820463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910281 + 5910282.

It is an arithmetic number, because the mean of its divisors is an integer number (5910282).

Almost surely, 2^11820563 is an apocalyptic number.

11820563 is a deficient number, since it is larger than the sum of its proper divisors (1).

11820563 is an equidigital number, since it uses as much as digits as its factorization.

11820563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 11820563 is about 3438.1045650183. The cubic root of 11820563 is about 227.7959791303.

The spelling of 11820563 in words is "eleven million, eight hundred twenty thousand, five hundred sixty-three".