21010300320 has 192 divisors, whose sum is σ = 69757632000. Its totient is φ = 5300868096.

The previous prime is 21010300279. The next prime is 21010300331. The reversal of 21010300320 is 2300301012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21010300296 and 21010300305.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13305291 + ... + 13306869.

It is an arithmetic number, because the mean of its divisors is an integer number (363321000).

Almost surely, 2^21010300320 is an apocalyptic number.

21010300320 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 21010300320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34878816000).

21010300320 is an abundant number, since it is smaller than the sum of its proper divisors (48747331680).

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

21010300320 is a wasteful number, since it uses less digits than its factorization.

21010300320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075 (or 3067 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21010300320 its reverse (2300301012), we get a palindrome (23310601332).

The spelling of 21010300320 in words is "twenty-one billion, ten million, three hundred thousand, three hundred twenty".