11563803 has 20 divisors (see below), whose sum is σ = 17365920. Its totient is φ = 7668432.

The previous prime is 11563801. The next prime is 11563829. The reversal of 11563803 is 30836511.

11563803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11563803 - 2¹ = 11563801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11563801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29533 + ... + 29921.

It is an arithmetic number, because the mean of its divisors is an integer number (868296).

Almost surely, 2^11563803 is an apocalyptic number.

11563803 is a deficient number, since it is larger than the sum of its proper divisors (5802117).

11563803 is an equidigital number, since it uses as much as digits as its factorization.

11563803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 11563803 is about 3400.5592187168. The cubic root of 11563803 is about 226.1345362842.

The spelling of 11563803 in words is "eleven million, five hundred sixty-three thousand, eight hundred three".