21444020322 has 8 divisors (see below), whose sum is σ = 42888040656. Its totient is φ = 7148006772.

The previous prime is 21444020309. The next prime is 21444020327. The reversal of 21444020322 is 22302044412.

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

21444020322 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21444020292 and 21444020301.

It is not an unprimeable number, because it can be changed into a prime (21444020327) 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 3 ways as a sum of consecutive naturals, for example, 1787001688 + ... + 1787001699.

It is an arithmetic number, because the mean of its divisors is an integer number (5361005082).

Almost surely, 2^21444020322 is an apocalyptic number.

21444020322 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21444020322 is a wasteful number, since it uses less digits than its factorization.

21444020322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574003392.

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

Adding to 21444020322 its reverse (22302044412), we get a palindrome (43746064734).

The spelling of 21444020322 in words is "twenty-one billion, four hundred forty-four million, twenty thousand, three hundred twenty-two".