21143469313 has 8 divisors (see below), whose sum is σ = 22391264808. Its totient is φ = 19896125184.

The previous prime is 21143469283. The next prime is 21143469317. The reversal of 21143469313 is 31396434112.

It can be written as a sum of positive squares in 4 ways, for example, as 9671345649 + 11472123664 = 98343^2 + 107108^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21143469313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21143469317) 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 7 ways as a sum of consecutive naturals, for example, 13906 + ... + 206107.

It is an arithmetic number, because the mean of its divisors is an integer number (2798908101).

Almost surely, 2^21143469313 is an apocalyptic number.

It is an amenable number.

21143469313 is a deficient number, since it is larger than the sum of its proper divisors (1247795495).

21143469313 is a wasteful number, since it uses less digits than its factorization.

21143469313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225683.

The product of its digits is 46656, while the sum is 37.

The spelling of 21143469313 in words is "twenty-one billion, one hundred forty-three million, four hundred sixty-nine thousand, three hundred thirteen".