11003020020 has 48 divisors (see below), whose sum is σ = 34231619520. Its totient is φ = 2934138528.

The previous prime is 11003020013. The next prime is 11003020033. The reversal of 11003020020 is 2002030011.

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 = 11003019984 and 11003020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10187442 + ... + 10188521.

It is an arithmetic number, because the mean of its divisors is an integer number (713158740).

Almost surely, 2^11003020020 is an apocalyptic number.

11003020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11003020020 is an abundant number, since it is smaller than the sum of its proper divisors (23228599500).

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

11003020020 is a wasteful number, since it uses less digits than its factorization.

11003020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20375981 (or 20375973 counting only the distinct ones).

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

Adding to 11003020020 its reverse (2002030011), we get a palindrome (13005050031).

Subtracting from 11003020020 its reverse (2002030011), we obtain a palindrome (9000990009).

The spelling of 11003020020 in words is "eleven billion, three million, twenty thousand, twenty".