21044300203 has 4 divisors (see below), whose sum is σ = 21204943848. Its totient is φ = 20883656560.

The previous prime is 21044300201. The next prime is 21044300209. The reversal of 21044300203 is 30200344012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21044300203 - 2¹ = 21044300201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21044300201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80321626 + ... + 80321887.

It is an arithmetic number, because the mean of its divisors is an integer number (5301235962).

Almost surely, 2^21044300203 is an apocalyptic number.

21044300203 is a deficient number, since it is larger than the sum of its proper divisors (160643645).

21044300203 is a wasteful number, since it uses less digits than its factorization.

21044300203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160643644.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21044300203 its reverse (30200344012), we get a palindrome (51244644215).

The spelling of 21044300203 in words is "twenty-one billion, forty-four million, three hundred thousand, two hundred three".