11355535220 has 144 divisors (see below), whose sum is σ = 26423324928. Its totient is φ = 4084684800.

The previous prime is 11355535207. The next prime is 11355535291. The reversal of 11355535220 is 2253555311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43176809 + ... + 43177071.

It is an arithmetic number, because the mean of its divisors is an integer number (183495312).

Almost surely, 2^11355535220 is an apocalyptic number.

11355535220 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 11355535220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13211662464).

11355535220 is an abundant number, since it is smaller than the sum of its proper divisors (15067789708).

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

11355535220 is a wasteful number, since it uses less digits than its factorization.

11355535220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

It can be divided in two parts, 1135 and 5535220, that added together give a palindrome (5536355).

The spelling of 11355535220 in words is "eleven billion, three hundred fifty-five million, five hundred thirty-five thousand, two hundred twenty".