21443110203 has 8 divisors (see below), whose sum is σ = 29363538448. Its totient is φ = 13909044384.

The previous prime is 21443110187. The next prime is 21443110229. The reversal of 21443110203 is 30201134412.

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

It is not a de Polignac number, because 21443110203 - 2⁴ = 21443110187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443110203.

It is not an unprimeable number, because it can be changed into a prime (21443110103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96590476 + ... + 96590697.

It is an arithmetic number, because the mean of its divisors is an integer number (3670442306).

Almost surely, 2^21443110203 is an apocalyptic number.

21443110203 is a deficient number, since it is larger than the sum of its proper divisors (7920428245).

21443110203 is a wasteful number, since it uses less digits than its factorization.

21443110203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193181213.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21443110203 its reverse (30201134412), we get a palindrome (51644244615).

The spelling of 21443110203 in words is "twenty-one billion, four hundred forty-three million, one hundred ten thousand, two hundred three".