21433202320 has 80 divisors (see below), whose sum is σ = 52483515840. Its totient is φ = 8117632512.

The previous prime is 21433202317. The next prime is 21433202363. The reversal of 21433202320 is 2320233412.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 21433202291 and 21433202300.

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, 4613919 + ... + 4618561.

It is an arithmetic number, because the mean of its divisors is an integer number (656043948).

Almost surely, 2^21433202320 is an apocalyptic number.

21433202320 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 21433202320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26241757920).

21433202320 is an abundant number, since it is smaller than the sum of its proper divisors (31050313520).

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

21433202320 is a wasteful number, since it uses less digits than its factorization.

21433202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712 (or 7706 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21433202320 its reverse (2320233412), we get a palindrome (23753435732).

The spelling of 21433202320 in words is "twenty-one billion, four hundred thirty-three million, two hundred two thousand, three hundred twenty".