21324120020343 has 24 divisors (see below), whose sum is σ = 35524673527200. Its totient is φ = 12073420505664.

The previous prime is 21324120020321. The next prime is 21324120020447. The reversal of 21324120020343 is 34302002142312.

21324120020343 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 412 + 0 + 0 + 203 + 43 = 666.

It is not a de Polignac number, because 21324120020343 - 2⁶ = 21324120020279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324120020743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1552644948 + ... + 1552658681.

It is an arithmetic number, because the mean of its divisors is an integer number (1480194730300).

Almost surely, 2^{21324120020343} is an apocalyptic number.

21324120020343 is a deficient number, since it is larger than the sum of its proper divisors (14200553506857).

21324120020343 is a wasteful number, since it uses less digits than its factorization.

21324120020343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105303751 (or 3105303748 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21324120020343 its reverse (34302002142312), we get a palindrome (55626122162655).

The spelling of 21324120020343 in words is "twenty-one trillion, three hundred twenty-four billion, one hundred twenty million, twenty thousand, three hundred forty-three".