11203020 has 72 divisors (see below), whose sum is σ = 34354320. Its totient is φ = 2954880.

The previous prime is 11203013. The next prime is 11203033. The reversal of 11203020 is 2030211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11202993 and 11203011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19335 + ... + 19905.

Almost surely, 2^11203020 is an apocalyptic number.

11203020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11203020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17177160).

11203020 is an abundant number, since it is smaller than the sum of its proper divisors (23151300).

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

11203020 is a wasteful number, since it uses less digits than its factorization.

11203020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 11203020 is about 3347.0912745248. The cubic root of 11203020 is about 223.7578963746.

Adding to 11203020 its reverse (2030211), we get a palindrome (13233231).

It can be divided in two parts, 1 and 1203020, that added together give a palindrome (1203021).

The spelling of 11203020 in words is "eleven million, two hundred three thousand, twenty".