21043245351324 has 48 divisors (see below), whose sum is σ = 57420328410368. Its totient is φ = 5872533585408.

The previous prime is 21043245351319. The next prime is 21043245351341. The reversal of 21043245351324 is 42315354234012.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2912959477 + ... + 2912966700.

Almost surely, 2^{21043245351324} is an apocalyptic number.

It is an amenable number.

21043245351324 is an abundant number, since it is smaller than the sum of its proper divisors (36377083059044).

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

21043245351324 is a wasteful number, since it uses less digits than its factorization.

21043245351324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825926234 (or 5825926232 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 21043245351324 its reverse (42315354234012), we get a palindrome (63358599585336).

The spelling of 21043245351324 in words is "twenty-one trillion, forty-three billion, two hundred forty-five million, three hundred fifty-one thousand, three hundred twenty-four".