21443143144 has 32 divisors (see below), whose sum is σ = 40394401920. Its totient is φ = 10671417856.

The previous prime is 21443143129. The next prime is 21443143153. The reversal of 21443143144 is 44134134412.

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 7 ways as a sum of consecutive naturals, for example, 1583169 + ... + 1596655.

It is an arithmetic number, because the mean of its divisors is an integer number (1262325060).

Almost surely, 2^21443143144 is an apocalyptic number.

It is an amenable number.

21443143144 is a deficient number, since it is larger than the sum of its proper divisors (18951258776).

21443143144 is a wasteful number, since it uses less digits than its factorization.

21443143144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14409 (or 14405 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

Adding to 21443143144 its reverse (44134134412), we get a palindrome (65577277556).

The spelling of 21443143144 in words is "twenty-one billion, four hundred forty-three million, one hundred forty-three thousand, one hundred forty-four".