21465675312 has 80 divisors (see below), whose sum is σ = 56684800512. Its totient is φ = 6996563200.

The previous prime is 21465675269. The next prime is 21465675347. The reversal of 21465675312 is 21357656412.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2877187 + ... + 2884637.

Almost surely, 2^21465675312 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 21465675312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28342400256).

21465675312 is an abundant number, since it is smaller than the sum of its proper divisors (35219125200).

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

21465675312 is a wasteful number, since it uses less digits than its factorization.

21465675312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8786 (or 8780 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The spelling of 21465675312 in words is "twenty-one billion, four hundred sixty-five million, six hundred seventy-five thousand, three hundred twelve".