21117060617 has 8 divisors (see below), whose sum is σ = 22229839200. Its totient is φ = 20004417504.

The previous prime is 21117060589. The next prime is 21117060749. The reversal of 21117060617 is 71606071112.

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

It is a cyclic number.

It is not a de Polignac number, because 21117060617 - 2⁶ = 21117060553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21117060317) 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, 511109 + ... + 550877.

It is an arithmetic number, because the mean of its divisors is an integer number (2778729900).

Almost surely, 2^21117060617 is an apocalyptic number.

It is an amenable number.

21117060617 is a deficient number, since it is larger than the sum of its proper divisors (1112778583).

21117060617 is a wasteful number, since it uses less digits than its factorization.

21117060617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67735.

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 21117060617 in words is "twenty-one billion, one hundred seventeen million, sixty thousand, six hundred seventeen".