17421560117 has 4 divisors (see below), whose sum is σ = 18761680140. Its totient is φ = 16081440096.

The previous prime is 17421560111. The next prime is 17421560129. The reversal of 17421560117 is 71106512471.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4156509841 + 13265050276 = 64471^2 + 115174^2 .

It is a cyclic number.

It is not a de Polignac number, because 17421560117 - 2¹⁶ = 17421494581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17421560111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670059992 + ... + 670060017.

It is an arithmetic number, because the mean of its divisors is an integer number (4690420035).

Almost surely, 2^17421560117 is an apocalyptic number.

It is an amenable number.

17421560117 is a deficient number, since it is larger than the sum of its proper divisors (1340120023).

17421560117 is a wasteful number, since it uses less digits than its factorization.

17421560117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340120022.

The product of its (nonzero) digits is 11760, while the sum is 35.

The spelling of 17421560117 in words is "seventeen billion, four hundred twenty-one million, five hundred sixty thousand, one hundred seventeen".