21312066300 has 144 divisors (see below), whose sum is σ = 74181085440. Its totient is φ = 4614935040.

The previous prime is 21312066263. The next prime is 21312066301. The reversal of 21312066300 is 366021312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312066301) by changing a digit.

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, 227169 + ... + 306968.

Almost surely, 2^21312066300 is an apocalyptic number.

21312066300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312066300 is an abundant number, since it is smaller than the sum of its proper divisors (52869019140).

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

21312066300 is a wasteful number, since it uses less digits than its factorization.

21312066300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534180 (or 534173 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21312066300 its reverse (366021312), we get a palindrome (21678087612).

The spelling of 21312066300 in words is "twenty-one billion, three hundred twelve million, sixty-six thousand, three hundred".