21716655244 has 12 divisors (see below), whose sum is σ = 38524751944. Its totient is φ = 10709583264.

The previous prime is 21716655229. The next prime is 21716655263. The reversal of 21716655244 is 44255661712.

It is a super-2 number, since 2×21716655244² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21716655244.

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 3 ways as a sum of consecutive naturals, for example, 37185762 + ... + 37186345.

Almost surely, 2^21716655244 is an apocalyptic number.

It is an amenable number.

21716655244 is a deficient number, since it is larger than the sum of its proper divisors (16808096700).

21716655244 is a wasteful number, since it uses less digits than its factorization.

21716655244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74372184 (or 74372182 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 21716655244 in words is "twenty-one billion, seven hundred sixteen million, six hundred fifty-five thousand, two hundred forty-four".