11203355385 has 24 divisors (see below), whose sum is σ = 20561453640. Its totient is φ = 5623644672.

The previous prime is 11203355369. The next prime is 11203355431. The reversal of 11203355385 is 58355330211.

11203355385 is a `hidden beast` number, since 1 + 1 + 20 + 3 + 3 + 553 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 555592041 + 10647763344 = 23571^2 + 103188^2 .

It is not a de Polignac number, because 11203355385 - 2⁴ = 11203355369 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7321690 + ... + 7323219.

It is an arithmetic number, because the mean of its divisors is an integer number (856727235).

Almost surely, 2^11203355385 is an apocalyptic number.

11203355385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11203355385 is a deficient number, since it is larger than the sum of its proper divisors (9358098255).

11203355385 is a wasteful number, since it uses less digits than its factorization.

11203355385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14644937 (or 14644934 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 11203355385 its reverse (58355330211), we get a palindrome (69558685596).

The spelling of 11203355385 in words is "eleven billion, two hundred three million, three hundred fifty-five thousand, three hundred eighty-five".