21343100364 has 72 divisors (see below), whose sum is σ = 57200493168. Its totient is φ = 6686929920.

The previous prime is 21343100327. The next prime is 21343100407. The reversal of 21343100364 is 46300134312.

It is an unprimeable number.

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, 442819 + ... + 488645.

It is an arithmetic number, because the mean of its divisors is an integer number (794451294).

Almost surely, 2^21343100364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21343100364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28600246584).

21343100364 is an abundant number, since it is smaller than the sum of its proper divisors (35857392804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21343100364 is a wasteful number, since it uses less digits than its factorization.

21343100364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46615 (or 46610 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21343100364 its reverse (46300134312), we get a palindrome (67643234676).

The spelling of 21343100364 in words is "twenty-one billion, three hundred forty-three million, one hundred thousand, three hundred sixty-four".