21144043300 has 36 divisors (see below), whose sum is σ = 46051941376. Its totient is φ = 8426397600.

The previous prime is 21144043259. The next prime is 21144043331. The reversal of 21144043300 is 334044112.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 363012 + ... + 417211.

Almost surely, 2^21144043300 is an apocalyptic number.

21144043300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21144043300 is an abundant number, since it is smaller than the sum of its proper divisors (24907898076).

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

21144043300 is a wasteful number, since it uses less digits than its factorization.

21144043300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780508 (or 780501 counting only the distinct ones).

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

Adding to 21144043300 its reverse (334044112), we get a palindrome (21478087412).

The spelling of 21144043300 in words is "twenty-one billion, one hundred forty-four million, forty-three thousand, three hundred".