21700760217 has 8 divisors (see below), whose sum is σ = 28978123200. Its totient is φ = 14445285360.

The previous prime is 21700760183. The next prime is 21700760227. The reversal of 21700760217 is 71206700712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21700760217 - 2¹⁶ = 21700694681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21700760227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5469717 + ... + 5473682.

It is an arithmetic number, because the mean of its divisors is an integer number (3622265400).

Almost surely, 2^21700760217 is an apocalyptic number.

It is an amenable number.

21700760217 is a deficient number, since it is larger than the sum of its proper divisors (7277362983).

21700760217 is a wasteful number, since it uses less digits than its factorization.

21700760217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10944063.

The product of its (nonzero) digits is 8232, while the sum is 33.

The spelling of 21700760217 in words is "twenty-one billion, seven hundred million, seven hundred sixty thousand, two hundred seventeen".