22441424421 has 32 divisors (see below), whose sum is σ = 32859171072. Its totient is φ = 13540377600.

The previous prime is 22441424399. The next prime is 22441424437. The reversal of 22441424421 is 12442414422.

It is not a de Polignac number, because 22441424421 - 2¹⁰ = 22441423397 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22441424491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378061 + ... + 433373.

It is an arithmetic number, because the mean of its divisors is an integer number (1026849096).

Almost surely, 2^22441424421 is an apocalyptic number.

It is an amenable number.

22441424421 is a deficient number, since it is larger than the sum of its proper divisors (10417746651).

22441424421 is a wasteful number, since it uses less digits than its factorization.

22441424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55533.

The product of its digits is 16384, while the sum is 30.

Adding to 22441424421 its reverse (12442414422), we get a palindrome (34883838843).

Subtracting from 22441424421 its reverse (12442414422), we obtain a palindrome (9999009999).

The spelling of 22441424421 in words is "twenty-two billion, four hundred forty-one million, four hundred twenty-four thousand, four hundred twenty-one".