21304140312 has 256 divisors, whose sum is σ = 69651993600. Its totient is φ = 5277726720.

The previous prime is 21304140301. The next prime is 21304140329.

21304140312 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2338887 + ... + 2347977.

It is an arithmetic number, because the mean of its divisors is an integer number (272078100).

Almost surely, 2^21304140312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21304140312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34825996800).

21304140312 is an abundant number, since it is smaller than the sum of its proper divisors (48347853288).

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

21304140312 is a wasteful number, since it uses less digits than its factorization.

21304140312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186 (or 9182 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The spelling of 21304140312 in words is "twenty-one billion, three hundred four million, one hundred forty thousand, three hundred twelve".