21443423230 has 32 divisors (see below), whose sum is σ = 39854684160. Its totient is φ = 8298300960.

The previous prime is 21443423213. The next prime is 21443423249. The reversal of 21443423230 is 3232434412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393237 + ... + 1408543.

It is an arithmetic number, because the mean of its divisors is an integer number (1245458880).

Almost surely, 2^21443423230 is an apocalyptic number.

21443423230 is a deficient number, since it is larger than the sum of its proper divisors (18411260930).

21443423230 is a wasteful number, since it uses less digits than its factorization.

21443423230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19864.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21443423230 its reverse (3232434412), we get a palindrome (24675857642).

The spelling of 21443423230 in words is "twenty-one billion, four hundred forty-three million, four hundred twenty-three thousand, two hundred thirty".