21717005339244 has 48 divisors (see below), whose sum is σ = 51369306912000. Its totient is φ = 7140076190400.

The previous prime is 21717005339243. The next prime is 21717005339257. The reversal of 21717005339244 is 44293350071712.

It is a junction number, because it is equal to n+sod(n) for n = 21717005339193 and 21717005339202.

It is not an unprimeable number, because it can be changed into a prime (21717005339243) by changing a digit.

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, 33746494 + ... + 34384005.

It is an arithmetic number, because the mean of its divisors is an integer number (1070193894000).

Almost surely, 2^{21717005339244} is an apocalyptic number.

It is an amenable number.

21717005339244 is an abundant number, since it is smaller than the sum of its proper divisors (29652301572756).

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

21717005339244 is a wasteful number, since it uses less digits than its factorization.

21717005339244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68130870 (or 68130868 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 21717005339244 in words is "twenty-one trillion, seven hundred seventeen billion, five million, three hundred thirty-nine thousand, two hundred forty-four".