21544333314 has 64 divisors (see below), whose sum is σ = 50866348032. Its totient is φ = 5953017600.

The previous prime is 21544333297. The next prime is 21544333319. The reversal of 21544333314 is 41333344512.

It is not an unprimeable number, because it can be changed into a prime (21544333319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2353354 + ... + 2362490.

It is an arithmetic number, because the mean of its divisors is an integer number (794786688).

Almost surely, 2^21544333314 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21544333314, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25433174016).

21544333314 is an abundant number, since it is smaller than the sum of its proper divisors (29322014718).

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

21544333314 is a wasteful number, since it uses less digits than its factorization.

21544333314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10991.

The product of its digits is 51840, while the sum is 33.

Adding to 21544333314 its reverse (41333344512), we get a palindrome (62877677826).

The spelling of 21544333314 in words is "twenty-one billion, five hundred forty-four million, three hundred thirty-three thousand, three hundred fourteen".