21344044200 has 96 divisors (see below), whose sum is σ = 67574424960. Its totient is φ = 5570636800.

The previous prime is 21344044181. The next prime is 21344044201. The reversal of 21344044200 is 244044312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21344044201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350241 + ... + 406640.

It is an arithmetic number, because the mean of its divisors is an integer number (703900260).

Almost surely, 2^21344044200 is an apocalyptic number.

21344044200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21344044200 is an abundant number, since it is smaller than the sum of its proper divisors (46230380760).

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

21344044200 is a wasteful number, since it uses less digits than its factorization.

21344044200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756947 (or 756938 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21344044200 its reverse (244044312), we get a palindrome (21588088512).

The spelling of 21344044200 in words is "twenty-one billion, three hundred forty-four million, forty-four thousand, two hundred".