21443044370 has 64 divisors (see below), whose sum is σ = 43245290880. Its totient is φ = 7589184000.

The previous prime is 21443044369. The next prime is 21443044373. The reversal of 21443044370 is 7344034412.

It is not an unprimeable number, because it can be changed into a prime (21443044373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639134 + ... + 671846.

It is an arithmetic number, because the mean of its divisors is an integer number (675707670).

Almost surely, 2^21443044370 is an apocalyptic number.

21443044370 is an abundant number, since it is smaller than the sum of its proper divisors (21802246510).

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

21443044370 is a wasteful number, since it uses less digits than its factorization.

21443044370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32891.

The product of its (nonzero) digits is 32256, while the sum is 32.

Adding to 21443044370 its reverse (7344034412), we get a palindrome (28787078782).

The spelling of 21443044370 in words is "twenty-one billion, four hundred forty-three million, forty-four thousand, three hundred seventy".