21323311300 has 18 divisors (see below), whose sum is σ = 46271585738. Its totient is φ = 8529324480.

The previous prime is 21323311297. The next prime is 21323311309. The reversal of 21323311300 is 311332312.

It can be written as a sum of positive squares in 3 ways, for example, as 9647236 + 21313664064 = 3106^2 + 145992^2 .

It is not an unprimeable number, because it can be changed into a prime (21323311309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106616457 + ... + 106616656.

Almost surely, 2^21323311300 is an apocalyptic number.

21323311300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323311300 is an abundant number, since it is smaller than the sum of its proper divisors (24948274438).

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

21323311300 is a wasteful number, since it uses less digits than its factorization.

21323311300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213233127 (or 213233120 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21323311300 its reverse (311332312), we get a palindrome (21634643612).

The spelling of 21323311300 in words is "twenty-one billion, three hundred twenty-three million, three hundred eleven thousand, three hundred".