21343100013 has 24 divisors (see below), whose sum is σ = 31127896800. Its totient is φ = 14090881824.

The previous prime is 21343099997. The next prime is 21343100039. The reversal of 21343100013 is 31000134312.

It is not a de Polignac number, because 21343100013 - 2⁴ = 21343099997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343100213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2415718 + ... + 2424536.

It is an arithmetic number, because the mean of its divisors is an integer number (1296995700).

Almost surely, 2^21343100013 is an apocalyptic number.

It is an amenable number.

21343100013 is a deficient number, since it is larger than the sum of its proper divisors (9784796787).

21343100013 is a wasteful number, since it uses less digits than its factorization.

21343100013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11401 (or 11398 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21343100013 its reverse (31000134312), we get a palindrome (52343234325).

The spelling of 21343100013 in words is "twenty-one billion, three hundred forty-three million, one hundred thousand, thirteen".