22224400220 has 96 divisors (see below), whose sum is σ = 54404602560. Its totient is φ = 7536291840.

The previous prime is 22224400217. The next prime is 22224400223. The reversal of 22224400220 is 2200442222.

It is an interprime number because it is at equal distance from previous prime (22224400217) and next prime (22224400223).

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 = 22224400192 and 22224400201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224400223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380402 + ... + 434918.

It is an arithmetic number, because the mean of its divisors is an integer number (566714610).

Almost surely, 2^22224400220 is an apocalyptic number.

22224400220 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 22224400220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27202301280).

22224400220 is an abundant number, since it is smaller than the sum of its proper divisors (32180202340).

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

22224400220 is a wasteful number, since it uses less digits than its factorization.

22224400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54663 (or 54661 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22224400220 its reverse (2200442222), we get a palindrome (24424842442).

It can be divided in two parts, 222 and 24400220, that added together give a palindrome (24400442).

The spelling of 22224400220 in words is "twenty-two billion, two hundred twenty-four million, four hundred thousand, two hundred twenty".