21303300313 has 4 divisors (see below), whose sum is σ = 21303845248. Its totient is φ = 21302755380.

The previous prime is 21303300311. The next prime is 21303300401. The reversal of 21303300313 is 31300330312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21303300313 - 2¹ = 21303300311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303300311) 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, 208881 + ... + 293662.

It is an arithmetic number, because the mean of its divisors is an integer number (5325961312).

Almost surely, 2^21303300313 is an apocalyptic number.

It is an amenable number.

21303300313 is a deficient number, since it is larger than the sum of its proper divisors (544935).

21303300313 is an equidigital number, since it uses as much as digits as its factorization.

21303300313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544934.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21303300313 its reverse (31300330312), we get a palindrome (52603630625).

The spelling of 21303300313 in words is "twenty-one billion, three hundred three million, three hundred thousand, three hundred thirteen".