21343424044 has 12 divisors (see below), whose sum is σ = 39548109384. Its totient is φ = 10043964224.

The previous prime is 21343424009. The next prime is 21343424083. The reversal of 21343424044 is 44042434312.

It is a junction number, because it is equal to n+sod(n) for n = 21343423997 and 21343424015.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 156936874 + ... + 156937009.

It is an arithmetic number, because the mean of its divisors is an integer number (3295675782).

Almost surely, 2^21343424044 is an apocalyptic number.

It is an amenable number.

21343424044 is a deficient number, since it is larger than the sum of its proper divisors (18204685340).

21343424044 is a wasteful number, since it uses less digits than its factorization.

21343424044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313873904 (or 313873902 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21343424044 its reverse (44042434312), we get a palindrome (65385858356).

The spelling of 21343424044 in words is "twenty-one billion, three hundred forty-three million, four hundred twenty-four thousand, forty-four".