17997393145 has 8 divisors (see below), whose sum is σ = 22867276104. Its totient is φ = 13550978304.

The previous prime is 17997393131. The next prime is 17997393149. The reversal of 17997393145 is 54139379971.

It can be written as a sum of positive squares in 4 ways, for example, as 1046134336 + 16951258809 = 32344^2 + 130197^2 .

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 17997393145 - 2¹⁵ = 17997360377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17997393145.

It is not an unprimeable number, because it can be changed into a prime (17997393149) 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, 105866934 + ... + 105867103.

It is an arithmetic number, because the mean of its divisors is an integer number (2858409513).

Almost surely, 2^17997393145 is an apocalyptic number.

It is an amenable number.

17997393145 is a deficient number, since it is larger than the sum of its proper divisors (4869882959).

17997393145 is a wasteful number, since it uses less digits than its factorization.

17997393145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211734059.

The product of its digits is 6429780, while the sum is 58.

The spelling of 17997393145 in words is "seventeen billion, nine hundred ninety-seven million, three hundred ninety-three thousand, one hundred forty-five".