17985341573 has 8 divisors (see below), whose sum is σ = 19045058328. Its totient is φ = 16925819904.

The previous prime is 17985341567. The next prime is 17985341609. The reversal of 17985341573 is 37514358971.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 955613569 + 17029728004 = 30913^2 + 130498^2 .

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 17985341573 - 2⁴ = 17985341557 is a prime.

It is a super-2 number, since 2×17985341573² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17985341503) 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, 168815 + ... + 253907.

It is an arithmetic number, because the mean of its divisors is an integer number (2380632291).

Almost surely, 2^17985341573 is an apocalyptic number.

It is an amenable number.

17985341573 is a deficient number, since it is larger than the sum of its proper divisors (1059716755).

17985341573 is a wasteful number, since it uses less digits than its factorization.

17985341573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97543.

The product of its digits is 3175200, while the sum is 53.

The spelling of 17985341573 in words is "seventeen billion, nine hundred eighty-five million, three hundred forty-one thousand, five hundred seventy-three".