21717067097 has 8 divisors (see below), whose sum is σ = 24092894880. Its totient is φ = 19408164160.

The previous prime is 21717066961. The next prime is 21717067111. The reversal of 21717067097 is 79076071712.

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 21717067097 - 2¹⁰ = 21717066073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21717067997) 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, 16730528 + ... + 16731825.

It is an arithmetic number, because the mean of its divisors is an integer number (3011611860).

Almost surely, 2^21717067097 is an apocalyptic number.

It is an amenable number.

21717067097 is a deficient number, since it is larger than the sum of its proper divisors (2375827783).

21717067097 is a wasteful number, since it uses less digits than its factorization.

21717067097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33462423.

The product of its (nonzero) digits is 259308, while the sum is 47.

The spelling of 21717067097 in words is "twenty-one billion, seven hundred seventeen million, sixty-seven thousand, ninety-seven".