21466066412 has 48 divisors (see below), whose sum is σ = 44050843200. Its totient is φ = 9148809600.

The previous prime is 21466066397. The next prime is 21466066439.

21466066412 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205112 + ... + 291552.

It is an arithmetic number, because the mean of its divisors is an integer number (917725900).

Almost surely, 2^21466066412 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 21466066412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22025421600).

21466066412 is an abundant number, since it is smaller than the sum of its proper divisors (22584776788).

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

21466066412 is a wasteful number, since it uses less digits than its factorization.

21466066412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86647 (or 86631 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 21466066412 in words is "twenty-one billion, four hundred sixty-six million, sixty-six thousand, four hundred twelve".