21303323030300 has 144 divisors (see below), whose sum is σ = 49100789848320. Its totient is φ = 8005326743040.

The previous prime is 21303323030287. The next prime is 21303323030329. The reversal of 21303323030300 is 303032330312.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148791347 + ... + 148934453.

It is an arithmetic number, because the mean of its divisors is an integer number (340977707280).

Almost surely, 2^{21303323030300} is an apocalyptic number.

21303323030300 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 21303323030300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24550394924160).

21303323030300 is an abundant number, since it is smaller than the sum of its proper divisors (27797466818020).

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

21303323030300 is a wasteful number, since it uses less digits than its factorization.

21303323030300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144300 (or 144293 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 23.

Adding to 21303323030300 its reverse (303032330312), we get a palindrome (21606355360612).

The spelling of 21303323030300 in words is "twenty-one trillion, three hundred three billion, three hundred twenty-three million, thirty thousand, three hundred".