21313130304 has 28 divisors (see below), whose sum is σ = 56390991104. Its totient is φ = 7104376704.

The previous prime is 21313130303. The next prime is 21313130317. The reversal of 21313130304 is 40303131312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313130303) 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 3 ways as a sum of consecutive naturals, for example, 55502752 + ... + 55503135.

It is an arithmetic number, because the mean of its divisors is an integer number (2013963968).

Almost surely, 2^21313130304 is an apocalyptic number.

21313130304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21313130304 is an abundant number, since it is smaller than the sum of its proper divisors (35077860800).

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

21313130304 is a wasteful number, since it uses less digits than its factorization.

21313130304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111005902 (or 111005892 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21313130304 its reverse (40303131312), we get a palindrome (61616261616).

The spelling of 21313130304 in words is "twenty-one billion, three hundred thirteen million, one hundred thirty thousand, three hundred four".