21323301132 has 96 divisors (see below), whose sum is σ = 59757440512. Its totient is φ = 5789822976.

The previous prime is 21323301107. The next prime is 21323301193. The reversal of 21323301132 is 23110332312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21323301099 and 21323301108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53868 + ... + 213420.

Almost surely, 2^21323301132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21323301132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29878720256).

21323301132 is an abundant number, since it is smaller than the sum of its proper divisors (38434139380).

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

21323301132 is a wasteful number, since it uses less digits than its factorization.

21323301132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159647 (or 159645 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21323301132 its reverse (23110332312), we get a palindrome (44433633444).

The spelling of 21323301132 in words is "twenty-one billion, three hundred twenty-three million, three hundred one thousand, one hundred thirty-two".