21320210303 has 8 divisors (see below), whose sum is σ = 24438259872. Its totient is φ = 18220237056.

The previous prime is 21320210297. The next prime is 21320210309. The reversal of 21320210303 is 30301202312.

It is an interprime number because it is at equal distance from previous prime (21320210297) and next prime (21320210309).

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

It is not a de Polignac number, because 21320210303 - 2⁸ = 21320210047 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 (21320210309) 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, 4516550 + ... + 4521267.

It is an arithmetic number, because the mean of its divisors is an integer number (3054782484).

Almost surely, 2^21320210303 is an apocalyptic number.

21320210303 is a deficient number, since it is larger than the sum of its proper divisors (3118049569).

21320210303 is an equidigital number, since it uses as much as digits as its factorization.

21320210303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9038161.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21320210303 its reverse (30301202312), we get a palindrome (51621412615).

The spelling of 21320210303 in words is "twenty-one billion, three hundred twenty million, two hundred ten thousand, three hundred three".