21043024312 has 40 divisors (see below), whose sum is σ = 40875787800. Its totient is φ = 10155969824.

The previous prime is 21043024273. The next prime is 21043024339. The reversal of 21043024312 is 21342034012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5656389 + ... + 5660107.

It is an arithmetic number, because the mean of its divisors is an integer number (1021894695).

Almost surely, 2^21043024312 is an apocalyptic number.

It is an amenable number.

21043024312 is a deficient number, since it is larger than the sum of its proper divisors (19832763488).

21043024312 is an frugal number, since it uses more digits than its factorization.

21043024312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841 (or 3750 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21043024312 its reverse (21342034012), we get a palindrome (42385058324).

The spelling of 21043024312 in words is "twenty-one billion, forty-three million, twenty-four thousand, three hundred twelve".