21430012313 has 4 divisors (see below), whose sum is σ = 21446460288. Its totient is φ = 21413564340.

The previous prime is 21430012301. The next prime is 21430012343. The reversal of 21430012313 is 31321003412.

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 21430012313 - 2¹⁶ = 21429946777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21430012343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8222033 + ... + 8224638.

It is an arithmetic number, because the mean of its divisors is an integer number (5361615072).

Almost surely, 2^21430012313 is an apocalyptic number.

It is an amenable number.

21430012313 is a deficient number, since it is larger than the sum of its proper divisors (16447975).

21430012313 is a wasteful number, since it uses less digits than its factorization.

21430012313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16447974.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21430012313 its reverse (31321003412), we get a palindrome (52751015725).

The spelling of 21430012313 in words is "twenty-one billion, four hundred thirty million, twelve thousand, three hundred thirteen".