22103213220 has 144 divisors (see below), whose sum is σ = 73209794112. Its totient is φ = 5353355520.

The previous prime is 22103213191. The next prime is 22103213263. The reversal of 22103213220 is 2231230122.

22103213220 is a `hidden beast` number, since 2 + 21 + 0 + 321 + 322 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22103213193 and 22103213202.

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, 2397139 + ... + 2406341.

It is an arithmetic number, because the mean of its divisors is an integer number (508401348).

Almost surely, 2^22103213220 is an apocalyptic number.

22103213220 is a gapful number since it is divisible by the number (20) 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 22103213220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36604897056).

22103213220 is an abundant number, since it is smaller than the sum of its proper divisors (51106580892).

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

22103213220 is a wasteful number, since it uses less digits than its factorization.

22103213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10442 (or 10437 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22103213220 its reverse (2231230122), we get a palindrome (24334443342).

The spelling of 22103213220 in words is "twenty-two billion, one hundred three million, two hundred thirteen thousand, two hundred twenty".