21044143300 has 18 divisors (see below), whose sum is σ = 45665791178. Its totient is φ = 8417657280.

The previous prime is 21044143259. The next prime is 21044143303. The reversal of 21044143300 is 334144012.

It can be written as a sum of positive squares in 3 ways, for example, as 6713180356 + 14330962944 = 81934^2 + 119712^2 .

It is not an unprimeable number, because it can be changed into a prime (21044143303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105220617 + ... + 105220816.

Almost surely, 2^21044143300 is an apocalyptic number.

21044143300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21044143300 is an abundant number, since it is smaller than the sum of its proper divisors (24621647878).

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

21044143300 is a wasteful number, since it uses less digits than its factorization.

21044143300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210441447 (or 210441440 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21044143300 its reverse (334144012), we get a palindrome (21378287312).

The spelling of 21044143300 in words is "twenty-one billion, forty-four million, one hundred forty-three thousand, three hundred".