11144320220 has 72 divisors (see below), whose sum is σ = 25748019024. Its totient is φ = 4048704000.

The previous prime is 11144320217. The next prime is 11144320223. The reversal of 11144320220 is 2202344111.

It is an interprime number because it is at equal distance from previous prime (11144320217) and next prime (11144320223).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11144320192 and 11144320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11144320223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5155940 + ... + 5158100.

Almost surely, 2^11144320220 is an apocalyptic number.

11144320220 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 11144320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12874009512).

11144320220 is an abundant number, since it is smaller than the sum of its proper divisors (14603698804).

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

11144320220 is a wasteful number, since it uses less digits than its factorization.

11144320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323 (or 4310 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11144320220 its reverse (2202344111), we get a palindrome (13346664331).

The spelling of 11144320220 in words is "eleven billion, one hundred forty-four million, three hundred twenty thousand, two hundred twenty".