21343030313 has 4 divisors (see below), whose sum is σ = 23283305808. Its totient is φ = 19402754820.

The previous prime is 21343030301. The next prime is 21343030393. The reversal of 21343030313 is 31303034312.

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 21343030313 - 2⁶ = 21343030249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343030393) 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, 970137731 + ... + 970137752.

It is an arithmetic number, because the mean of its divisors is an integer number (5820826452).

Almost surely, 2^21343030313 is an apocalyptic number.

It is an amenable number.

21343030313 is a deficient number, since it is larger than the sum of its proper divisors (1940275495).

21343030313 is a wasteful number, since it uses less digits than its factorization.

21343030313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940275494.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21343030313 its reverse (31303034312), we get a palindrome (52646064625).

The spelling of 21343030313 in words is "twenty-one billion, three hundred forty-three million, thirty thousand, three hundred thirteen".