21324323120 has 40 divisors (see below), whose sum is σ = 49667218416. Its totient is φ = 8514560768.

The previous prime is 21324323101. The next prime is 21324323129. The reversal of 21324323120 is 2132342312.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (21324323129) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 191687 + ... + 281766.

Almost surely, 2^21324323120 is an apocalyptic number.

21324323120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21324323120 is an abundant number, since it is smaller than the sum of its proper divisors (28342895296).

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

21324323120 is a wasteful number, since it uses less digits than its factorization.

21324323120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474029 (or 474023 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21324323120 its reverse (2132342312), we get a palindrome (23456665432).

The spelling of 21324323120 in words is "twenty-one billion, three hundred twenty-four million, three hundred twenty-three thousand, one hundred twenty".