21302303223 has 16 divisors (see below), whose sum is σ = 28569996000. Its totient is φ = 14118128640.

The previous prime is 21302303189. The next prime is 21302303227. The reversal of 21302303223 is 32230320312.

It is not a de Polignac number, because 21302303223 - 2⁹ = 21302302711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21302303223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302303227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2193763 + ... + 2203451.

It is an arithmetic number, because the mean of its divisors is an integer number (1785624750).

Almost surely, 2^21302303223 is an apocalyptic number.

21302303223 is a deficient number, since it is larger than the sum of its proper divisors (7267692777).

21302303223 is a wasteful number, since it uses less digits than its factorization.

21302303223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13922.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21302303223 its reverse (32230320312), we get a palindrome (53532623535).

The spelling of 21302303223 in words is "twenty-one billion, three hundred two million, three hundred three thousand, two hundred twenty-three".