22020221424 has 60 divisors (see below), whose sum is σ = 57479245944. Its totient is φ = 7264253952.

The previous prime is 22020221423. The next prime is 22020221467. The reversal of 22020221424 is 42412202022.

It is a self number, because there is not a number n which added to its sum of digits gives 22020221424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020221423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427254 + ... + 476010.

Almost surely, 2^22020221424 is an apocalyptic number.

22020221424 is a gapful number since it is divisible by the number (24) 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 22020221424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28739622972).

22020221424 is an abundant number, since it is smaller than the sum of its proper divisors (35459024520).

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

22020221424 is an equidigital number, since it uses as much as digits as its factorization.

22020221424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48962 (or 48859 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 22020221424 its reverse (42412202022), we get a palindrome (64432423446).

The spelling of 22020221424 in words is "twenty-two billion, twenty million, two hundred twenty-one thousand, four hundred twenty-four".