21310022444 has 12 divisors (see below), whose sum is σ = 39486218184. Its totient is φ = 10028245824.

The previous prime is 21310022443. The next prime is 21310022467. The reversal of 21310022444 is 44422001312.

It is not an unprimeable number, because it can be changed into a prime (21310022443) 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, 156691274 + ... + 156691409.

It is an arithmetic number, because the mean of its divisors is an integer number (3290518182).

Almost surely, 2^21310022444 is an apocalyptic number.

It is an amenable number.

21310022444 is a deficient number, since it is larger than the sum of its proper divisors (18176195740).

21310022444 is a wasteful number, since it uses less digits than its factorization.

21310022444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313382704 (or 313382702 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21310022444 its reverse (44422001312), we get a palindrome (65732023756).

The spelling of 21310022444 in words is "twenty-one billion, three hundred ten million, twenty-two thousand, four hundred forty-four".