22220264612 has 72 divisors (see below), whose sum is σ = 48751368120. Its totient is φ = 8783631360.

The previous prime is 22220264587. The next prime is 22220264623. The reversal of 22220264612 is 21646202222.

It can be written as a sum of positive squares in 4 ways, for example, as 812478016 + 21407786596 = 28504^2 + 146314^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4433564 + ... + 4438572.

It is an arithmetic number, because the mean of its divisors is an integer number (677102335).

Almost surely, 2^22220264612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22220264612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24375684060).

22220264612 is an abundant number, since it is smaller than the sum of its proper divisors (26531103508).

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

22220264612 is a wasteful number, since it uses less digits than its factorization.

22220264612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6781 (or 6772 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 22220264612 its reverse (21646202222), we get a palindrome (43866466834).

The spelling of 22220264612 in words is "twenty-two billion, two hundred twenty million, two hundred sixty-four thousand, six hundred twelve".