21320103300 has 144 divisors (see below), whose sum is σ = 66158890560. Its totient is φ = 5284431360.

The previous prime is 21320103289. The next prime is 21320103313. The reversal of 21320103300 is 330102312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21320103300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 266814 + ... + 337386.

It is an arithmetic number, because the mean of its divisors is an integer number (459436740).

Almost surely, 2^21320103300 is an apocalyptic number.

21320103300 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 21320103300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33079445280).

21320103300 is an abundant number, since it is smaller than the sum of its proper divisors (44838787260).

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

21320103300 is a wasteful number, since it uses less digits than its factorization.

21320103300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70662 (or 70655 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21320103300 its reverse (330102312), we get a palindrome (21650205612).

The spelling of 21320103300 in words is "twenty-one billion, three hundred twenty million, one hundred three thousand, three hundred".