21302245223 has 16 divisors (see below), whose sum is σ = 24535292160. Its totient is φ = 18117038016.

The previous prime is 21302245213. The next prime is 21302245243. The reversal of 21302245223 is 32254220312.

It is not a de Polignac number, because 21302245223 - 2⁴ = 21302245207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302245192 and 21302245201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302245213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688868 + ... + 719126.

It is an arithmetic number, because the mean of its divisors is an integer number (1533455760).

Almost surely, 2^21302245223 is an apocalyptic number.

21302245223 is a deficient number, since it is larger than the sum of its proper divisors (3233046937).

21302245223 is a wasteful number, since it uses less digits than its factorization.

21302245223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31046.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21302245223 its reverse (32254220312), we get a palindrome (53556465535).

The spelling of 21302245223 in words is "twenty-one billion, three hundred two million, two hundred forty-five thousand, two hundred twenty-three".