21020303012320 has 192 divisors, whose sum is σ = 51764890351104. Its totient is φ = 8057270108160.

The previous prime is 21020303012299. The next prime is 21020303012363. The reversal of 21020303012320 is 2321030302012.

It is a congruent number.

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, 612587484 + ... + 612621796.

It is an arithmetic number, because the mean of its divisors is an integer number (269608803912).

Almost surely, 2^{21020303012320} is an apocalyptic number.

21020303012320 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 21020303012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25882445175552).

21020303012320 is an abundant number, since it is smaller than the sum of its proper divisors (30744587338784).

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

21020303012320 is a wasteful number, since it uses less digits than its factorization.

21020303012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35565 (or 35557 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21020303012320 its reverse (2321030302012), we get a palindrome (23341333314332).

The spelling of 21020303012320 in words is "twenty-one trillion, twenty billion, three hundred three million, twelve thousand, three hundred twenty".