11203145503 has 32 divisors (see below), whose sum is σ = 13845185280. Its totient is φ = 8932032000.

The previous prime is 11203145497. The next prime is 11203145543. The reversal of 11203145503 is 30554130211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11203145503 - 2⁹ = 11203144991 is a prime.

It is a super-2 number, since 2×11203145503² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203145543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190888 + ... + 242578.

It is an arithmetic number, because the mean of its divisors is an integer number (432662040).

Almost surely, 2^11203145503 is an apocalyptic number.

11203145503 is a deficient number, since it is larger than the sum of its proper divisors (2642039777).

11203145503 is a wasteful number, since it uses less digits than its factorization.

11203145503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51799.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 11203145503 its reverse (30554130211), we get a palindrome (41757275714).

The spelling of 11203145503 in words is "eleven billion, two hundred three million, one hundred forty-five thousand, five hundred three".