22442242420 has 48 divisors (see below), whose sum is σ = 51256569168. Its totient is φ = 8204313600.

The previous prime is 22442242411. The next prime is 22442242423. The reversal of 22442242420 is 2424224422.

It can be written as a sum of positive squares in 8 ways, for example, as 3213982864 + 19228259556 = 56692^2 + 138666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442242423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401049 + ... + 453568.

It is an arithmetic number, because the mean of its divisors is an integer number (1067845191).

Almost surely, 2^22442242420 is an apocalyptic number.

22442242420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22442242420 is an abundant number, since it is smaller than the sum of its proper divisors (28814326748).

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

22442242420 is a wasteful number, since it uses less digits than its factorization.

22442242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854740 (or 854738 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 22442242420 its reverse (2424224422), we get a palindrome (24866466842).

The spelling of 22442242420 in words is "twenty-two billion, four hundred forty-two million, two hundred forty-two thousand, four hundred twenty".