21320334244 has 12 divisors (see below), whose sum is σ = 40702456368. Its totient is φ = 9691061000.

The previous prime is 21320334241. The next prime is 21320334281. The reversal of 21320334244 is 44243302312.

It is not an unprimeable number, because it can be changed into a prime (21320334241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242276482 + ... + 242276569.

It is an arithmetic number, because the mean of its divisors is an integer number (3391871364).

Almost surely, 2^21320334244 is an apocalyptic number.

It is an amenable number.

21320334244 is a deficient number, since it is larger than the sum of its proper divisors (19382122124).

21320334244 is a wasteful number, since it uses less digits than its factorization.

21320334244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484553066 (or 484553064 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21320334244 its reverse (44243302312), we get a palindrome (65563636556).

The spelling of 21320334244 in words is "twenty-one billion, three hundred twenty million, three hundred thirty-four thousand, two hundred forty-four".