21300311304 has 48 divisors (see below), whose sum is σ = 60724575600. Its totient is φ = 6726413664.

The previous prime is 21300311303. The next prime is 21300311309. The reversal of 21300311304 is 40311300312.

21300311304 is a `hidden beast` number, since 21 + 30 + 0 + 311 + 304 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21300311303) 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, 7783834 + ... + 7786569.

It is an arithmetic number, because the mean of its divisors is an integer number (1265095325).

Almost surely, 2^21300311304 is an apocalyptic number.

21300311304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21300311304 is an abundant number, since it is smaller than the sum of its proper divisors (39424264296).

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

21300311304 is a wasteful number, since it uses less digits than its factorization.

21300311304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15570434 (or 15570427 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21300311304 its reverse (40311300312), we get a palindrome (61611611616).

The spelling of 21300311304 in words is "twenty-one billion, three hundred million, three hundred eleven thousand, three hundred four".