21344423322 has 32 divisors (see below), whose sum is σ = 43854479424. Its totient is φ = 6920640000.

The previous prime is 21344423263. The next prime is 21344423323. The reversal of 21344423322 is 22332444312.

It is a self number, because there is not a number n which added to its sum of digits gives 21344423322.

It is not an unprimeable number, because it can be changed into a prime (21344423323) 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 15 ways as a sum of consecutive naturals, for example, 977322 + ... + 998922.

It is an arithmetic number, because the mean of its divisors is an integer number (1370452482).

Almost surely, 2^21344423322 is an apocalyptic number.

21344423322 is an abundant number, since it is smaller than the sum of its proper divisors (22510056102).

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

21344423322 is a wasteful number, since it uses less digits than its factorization.

21344423322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26094.

The product of its digits is 27648, while the sum is 30.

Adding to 21344423322 its reverse (22332444312), we get a palindrome (43676867634).

The spelling of 21344423322 in words is "twenty-one billion, three hundred forty-four million, four hundred twenty-three thousand, three hundred twenty-two".