21443030343 has 32 divisors (see below), whose sum is σ = 36847557120. Its totient is φ = 12070270080.

The previous prime is 21443030333. The next prime is 21443030351. The reversal of 21443030343 is 34303034412.

21443030343 is a `hidden beast` number, since 2 + 14 + 4 + 303 + 0 + 343 = 666.

It is not a de Polignac number, because 21443030343 - 2⁵ = 21443030311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443030303) 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, 834018 + ... + 859343.

It is an arithmetic number, because the mean of its divisors is an integer number (1151486160).

Almost surely, 2^21443030343 is an apocalyptic number.

21443030343 is a deficient number, since it is larger than the sum of its proper divisors (15404526777).

21443030343 is a wasteful number, since it uses less digits than its factorization.

21443030343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693444 (or 1693438 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21443030343 its reverse (34303034412), we get a palindrome (55746064755).

The spelling of 21443030343 in words is "twenty-one billion, four hundred forty-three million, thirty thousand, three hundred forty-three".