21303543223 has 4 divisors (see below), whose sum is σ = 22424782360. Its totient is φ = 20182304088.

The previous prime is 21303543221. The next prime is 21303543241. The reversal of 21303543223 is 32234530312.

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 21303543223 - 2¹ = 21303543221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303543191 and 21303543200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303543221) 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, 560619540 + ... + 560619577.

It is an arithmetic number, because the mean of its divisors is an integer number (5606195590).

Almost surely, 2^21303543223 is an apocalyptic number.

21303543223 is a deficient number, since it is larger than the sum of its proper divisors (1121239137).

21303543223 is a wasteful number, since it uses less digits than its factorization.

21303543223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121239136.

The product of its (nonzero) digits is 12960, while the sum is 28.

The spelling of 21303543223 in words is "twenty-one billion, three hundred three million, five hundred forty-three thousand, two hundred twenty-three".