22420220256 has 192 divisors, whose sum is σ = 74891174400. Its totient is φ = 6392314368.

The previous prime is 22420220237. The next prime is 22420220257. The reversal of 22420220256 is 65202202422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420220257) 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, 3074791 + ... + 3082073.

It is an arithmetic number, because the mean of its divisors is an integer number (390058200).

Almost surely, 2^22420220256 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 22420220256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37445587200).

22420220256 is an abundant number, since it is smaller than the sum of its proper divisors (52470954144).

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

22420220256 is a wasteful number, since it uses less digits than its factorization.

22420220256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7818 (or 7804 counting only the distinct ones).

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

Adding to 22420220256 its reverse (65202202422), we get a palindrome (87622422678).

The spelling of 22420220256 in words is "twenty-two billion, four hundred twenty million, two hundred twenty thousand, two hundred fifty-six".