21424440322 has 8 divisors (see below), whose sum is σ = 32616312336. Its totient is φ = 10552336212.

The previous prime is 21424440307. The next prime is 21424440371. The reversal of 21424440322 is 22304442412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21424440322² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79941808 + ... + 79942075.

It is an arithmetic number, because the mean of its divisors is an integer number (4077039042).

Almost surely, 2^21424440322 is an apocalyptic number.

21424440322 is a deficient number, since it is larger than the sum of its proper divisors (11191872014).

21424440322 is a wasteful number, since it uses less digits than its factorization.

21424440322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159883952.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21424440322 its reverse (22304442412), we get a palindrome (43728882734).

It can be divided in two parts, 214 and 24440322, that added together give a triangular number (24440536 = T₆₉₉₁).

The spelling of 21424440322 in words is "twenty-one billion, four hundred twenty-four million, four hundred forty thousand, three hundred twenty-two".