21303230223 has 64 divisors (see below), whose sum is σ = 33326318592. Its totient is φ = 11973012480.

The previous prime is 21303230219. The next prime is 21303230227. The reversal of 21303230223 is 32203230312.

It is an interprime number because it is at equal distance from previous prime (21303230219) and next prime (21303230227).

It is not a de Polignac number, because 21303230223 - 2² = 21303230219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21303230223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303230227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8901115 + ... + 8903507.

It is an arithmetic number, because the mean of its divisors is an integer number (520723728).

Almost surely, 2^21303230223 is an apocalyptic number.

21303230223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21303230223 is a deficient number, since it is larger than the sum of its proper divisors (12023088369).

21303230223 is a wasteful number, since it uses less digits than its factorization.

21303230223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784.

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

Adding to 21303230223 its reverse (32203230312), we get a palindrome (53506460535).

The spelling of 21303230223 in words is "twenty-one billion, three hundred three million, two hundred thirty thousand, two hundred twenty-three".