21320320300 has 36 divisors (see below), whose sum is σ = 46282568976. Its totient is φ = 8524907200.

The previous prime is 21320320283. The next prime is 21320320309. The reversal of 21320320300 is 302302312.

It is not an unprimeable number, because it can be changed into a prime (21320320309) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 235209 + ... + 312991.

It is an arithmetic number, because the mean of its divisors is an integer number (1285626916).

Almost surely, 2^21320320300 is an apocalyptic number.

21320320300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320320300 is an abundant number, since it is smaller than the sum of its proper divisors (24962248676).

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

21320320300 is a wasteful number, since it uses less digits than its factorization.

21320320300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80538 (or 80531 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21320320300 its reverse (302302312), we get a palindrome (21622622612).

The spelling of 21320320300 in words is "twenty-one billion, three hundred twenty million, three hundred twenty thousand, three hundred".