11003220020 has 96 divisors (see below), whose sum is σ = 26370882720. Its totient is φ = 3826851840.

The previous prime is 11003220001. The next prime is 11003220031. The reversal of 11003220020 is 2002230011.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 9595769764 + 1407450256 = 97958^2 + 37516^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11003219983 and 11003220010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291344 + ... + 326936.

It is an arithmetic number, because the mean of its divisors is an integer number (274696695).

Almost surely, 2^11003220020 is an apocalyptic number.

11003220020 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 11003220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13185441360).

11003220020 is an abundant number, since it is smaller than the sum of its proper divisors (15367662700).

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

11003220020 is a wasteful number, since it uses less digits than its factorization.

11003220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35685 (or 35683 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 11003220020 its reverse (2002230011), we get a palindrome (13005450031).

Subtracting from 11003220020 its reverse (2002230011), we obtain a palindrome (9000990009).

The spelling of 11003220020 in words is "eleven billion, three million, two hundred twenty thousand, twenty".