21343432313 has 32 divisors (see below), whose sum is σ = 25430372352. Its totient is φ = 17533454400.

The previous prime is 21343432273. The next prime is 21343432343. The reversal of 21343432313 is 31323434312.

It is not a de Polignac number, because 21343432313 - 2¹⁰ = 21343431289 is a prime.

It is a super-2 number, since 2×21343432313² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21343432343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9234428 + ... + 9236738.

It is an arithmetic number, because the mean of its divisors is an integer number (794699136).

Almost surely, 2^21343432313 is an apocalyptic number.

It is an amenable number.

21343432313 is a deficient number, since it is larger than the sum of its proper divisors (4086940039).

21343432313 is a wasteful number, since it uses less digits than its factorization.

21343432313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925.

The product of its digits is 15552, while the sum is 29.

Adding to 21343432313 its reverse (31323434312), we get a palindrome (52666866625).

The spelling of 21343432313 in words is "twenty-one billion, three hundred forty-three million, four hundred thirty-two thousand, three hundred thirteen".