22240042420 has 24 divisors (see below), whose sum is σ = 46767319200. Its totient is φ = 8883973152.

The previous prime is 22240042403. The next prime is 22240042421. The reversal of 22240042420 is 2424004222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22240042391 and 22240042400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22240042421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737590 + ... + 767149.

It is an arithmetic number, because the mean of its divisors is an integer number (1948638300).

Almost surely, 2^22240042420 is an apocalyptic number.

22240042420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22240042420 is an abundant number, since it is smaller than the sum of its proper divisors (24527276780).

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

22240042420 is a wasteful number, since it uses less digits than its factorization.

22240042420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505487 (or 1505485 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 22240042420 its reverse (2424004222), we get a palindrome (24664046642).

The spelling of 22240042420 in words is "twenty-two billion, two hundred forty million, forty-two thousand, four hundred twenty".