22021042424 has 8 divisors (see below), whose sum is σ = 41289454560. Its totient is φ = 11010521208.

The previous prime is 22021042369. The next prime is 22021042441. The reversal of 22021042424 is 42424012022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 22021042424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1376315144 + ... + 1376315159.

It is an arithmetic number, because the mean of its divisors is an integer number (5161181820).

Almost surely, 2^22021042424 is an apocalyptic number.

It is an amenable number.

22021042424 is a deficient number, since it is larger than the sum of its proper divisors (19268412136).

22021042424 is a wasteful number, since it uses less digits than its factorization.

22021042424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752630309 (or 2752630305 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 22021042424 its reverse (42424012022), we get a palindrome (64445054446).

The spelling of 22021042424 in words is "twenty-two billion, twenty-one million, forty-two thousand, four hundred twenty-four".