21466866412 has 12 divisors (see below), whose sum is σ = 37776889080. Its totient is φ = 10673469536.

The previous prime is 21466866389. The next prime is 21466866427.

21466866412 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14990113 + ... + 14991544.

It is an arithmetic number, because the mean of its divisors is an integer number (3148074090).

Almost surely, 2^21466866412 is an apocalyptic number.

It is an amenable number.

21466866412 is a deficient number, since it is larger than the sum of its proper divisors (16310022668).

21466866412 is a wasteful number, since it uses less digits than its factorization.

21466866412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29981840 (or 29981838 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The spelling of 21466866412 in words is "twenty-one billion, four hundred sixty-six million, eight hundred sixty-six thousand, four hundred twelve".