21323333203 has 4 divisors (see below), whose sum is σ = 21327014808. Its totient is φ = 21319651600.

The previous prime is 21323333131. The next prime is 21323333249. The reversal of 21323333203 is 30233332312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323333203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323343203) 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, 1832101 + ... + 1843702.

It is an arithmetic number, because the mean of its divisors is an integer number (5331753702).

Almost surely, 2^21323333203 is an apocalyptic number.

21323333203 is a deficient number, since it is larger than the sum of its proper divisors (3681605).

21323333203 is an equidigital number, since it uses as much as digits as its factorization.

21323333203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681604.

The product of its (nonzero) digits is 5832, while the sum is 25.

Adding to 21323333203 its reverse (30233332312), we get a palindrome (51556665515).

The spelling of 21323333203 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-three thousand, two hundred three".