21044200143 has 8 divisors (see below), whose sum is σ = 28374202800. Its totient is φ = 13871832128.

The previous prime is 21044200127. The next prime is 21044200171. The reversal of 21044200143 is 34100244012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21044200143 - 2⁴ = 21044200127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044200103) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39408348 + ... + 39408881.

It is an arithmetic number, because the mean of its divisors is an integer number (3546775350).

Almost surely, 2^21044200143 is an apocalyptic number.

21044200143 is a deficient number, since it is larger than the sum of its proper divisors (7330002657).

21044200143 is an equidigital number, since it uses as much as digits as its factorization.

21044200143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78817321.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21044200143 its reverse (34100244012), we get a palindrome (55144444155).

The spelling of 21044200143 in words is "twenty-one billion, forty-four million, two hundred thousand, one hundred forty-three".