21303430223 has 8 divisors (see below), whose sum is σ = 21696214176. Its totient is φ = 20913222400.

The previous prime is 21303430207. The next prime is 21303430241. The reversal of 21303430223 is 32203430312.

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

It is a cyclic number.

It is not a de Polignac number, because 21303430223 - 2⁴ = 21303430207 is a prime.

It is a super-2 number, since 2×21303430223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303430243) 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, 627338 + ... + 660423.

It is an arithmetic number, because the mean of its divisors is an integer number (2712026772).

Almost surely, 2^21303430223 is an apocalyptic number.

21303430223 is a deficient number, since it is larger than the sum of its proper divisors (392783953).

21303430223 is a wasteful number, since it uses less digits than its factorization.

21303430223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288065.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21303430223 its reverse (32203430312), we get a palindrome (53506860535).

The spelling of 21303430223 in words is "twenty-one billion, three hundred three million, four hundred thirty thousand, two hundred twenty-three".