21466715366 has 4 divisors (see below), whose sum is σ = 32200073052. Its totient is φ = 10733357682.

The previous prime is 21466715357. The next prime is 21466715381. The reversal of 21466715366 is 66351766412.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21466715366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5366678840 + ... + 5366678843.

It is an arithmetic number, because the mean of its divisors is an integer number (8050018263).

Almost surely, 2^21466715366 is an apocalyptic number.

21466715366 is a deficient number, since it is larger than the sum of its proper divisors (10733357686).

21466715366 is a wasteful number, since it uses less digits than its factorization.

21466715366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10733357685.

The product of its digits is 1088640, while the sum is 47.

The spelling of 21466715366 in words is "twenty-one billion, four hundred sixty-six million, seven hundred fifteen thousand, three hundred sixty-six".