21302133320 has 64 divisors (see below), whose sum is σ = 51757816320. Its totient is φ = 7843901184.

The previous prime is 21302133317. The next prime is 21302133331. The reversal of 21302133320 is 2333120312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21302133292 and 21302133301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135029 + ... + 246651.

It is an arithmetic number, because the mean of its divisors is an integer number (808715880).

Almost surely, 2^21302133320 is an apocalyptic number.

21302133320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21302133320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25878908160).

21302133320 is an abundant number, since it is smaller than the sum of its proper divisors (30455683000).

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

21302133320 is a wasteful number, since it uses less digits than its factorization.

21302133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112014 (or 112010 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21302133320 its reverse (2333120312), we get a palindrome (23635253632).

The spelling of 21302133320 in words is "twenty-one billion, three hundred two million, one hundred thirty-three thousand, three hundred twenty".