22220054640 has 480 divisors, whose sum is σ = 91699845120. Its totient is φ = 4708233216.

The previous prime is 22220054611. The next prime is 22220054671. The reversal of 22220054640 is 4645002222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4498252 + ... + 4503188.

It is an arithmetic number, because the mean of its divisors is an integer number (191041344).

Almost surely, 2^22220054640 is an apocalyptic number.

22220054640 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 22220054640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45849922560).

22220054640 is an abundant number, since it is smaller than the sum of its proper divisors (69479790480).

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

22220054640 is a wasteful number, since it uses less digits than its factorization.

22220054640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 22220054640 its reverse (4645002222), we get a palindrome (26865056862).

The spelling of 22220054640 in words is "twenty-two billion, two hundred twenty million, fifty-four thousand, six hundred forty".