11051533220 has 96 divisors (see below), whose sum is σ = 28601260800. Its totient is φ = 3493062144.

The previous prime is 11051533193. The next prime is 11051533267. The reversal of 11051533220 is 2233515011.

It is a happy 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, 1559846 + ... + 1566914.

It is an arithmetic number, because the mean of its divisors is an integer number (297929800).

Almost surely, 2^11051533220 is an apocalyptic number.

11051533220 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 11051533220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14300630400).

11051533220 is an abundant number, since it is smaller than the sum of its proper divisors (17549727580).

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

11051533220 is a wasteful number, since it uses less digits than its factorization.

11051533220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7957 (or 7955 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 11051533220 in words is "eleven billion, fifty-one million, five hundred thirty-three thousand, two hundred twenty".