21323003303 has 8 divisors (see below), whose sum is σ = 24371647872. Its totient is φ = 18274984056.

The previous prime is 21323003297. The next prime is 21323003309. The reversal of 21323003303 is 30330032312.

It is an interprime number because it is at equal distance from previous prime (21323003297) and next prime (21323003309).

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

It is not a de Polignac number, because 21323003303 - 2²⁴ = 21306226087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323003309) 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, 80825 + ... + 221762.

It is an arithmetic number, because the mean of its divisors is an integer number (3046455984).

Almost surely, 2^21323003303 is an apocalyptic number.

21323003303 is a deficient number, since it is larger than the sum of its proper divisors (3048644569).

21323003303 is a wasteful number, since it uses less digits than its factorization.

21323003303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312661.

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 21323003303 its reverse (30330032312), we get a palindrome (51653035615).

The spelling of 21323003303 in words is "twenty-one billion, three hundred twenty-three million, three thousand, three hundred three".