22424430021 has 40 divisors (see below), whose sum is σ = 36716404320. Its totient is φ = 12139466976.

The previous prime is 22424430001. The next prime is 22424430031. The reversal of 22424430021 is 12003442422.

It is not a de Polignac number, because 22424430021 - 2⁷ = 22424429893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22424429973 and 22424430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22424430001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54931 + ... + 218783.

It is an arithmetic number, because the mean of its divisors is an integer number (917910108).

Almost surely, 2^22424430021 is an apocalyptic number.

22424430021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22424430021 is a deficient number, since it is larger than the sum of its proper divisors (14291974299).

22424430021 is an equidigital number, since it uses as much as digits as its factorization.

22424430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163903 (or 163882 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22424430021 its reverse (12003442422), we get a palindrome (34427872443).

The spelling of 22424430021 in words is "twenty-two billion, four hundred twenty-four million, four hundred thirty thousand, twenty-one".