17900042309 has 8 divisors (see below), whose sum is σ = 17999551488. Its totient is φ = 17800593840.

The previous prime is 17900042287. The next prime is 17900042317. The reversal of 17900042309 is 90324000971.

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 17900042309 - 2⁸ = 17900042053 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 (17900042009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658424 + ... + 685070.

It is an arithmetic number, because the mean of its divisors is an integer number (2249943936).

Almost surely, 2^17900042309 is an apocalyptic number.

It is an amenable number.

17900042309 is a deficient number, since it is larger than the sum of its proper divisors (99509179).

17900042309 is a wasteful number, since it uses less digits than its factorization.

17900042309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30355.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 17900042309 in words is "seventeen billion, nine hundred million, forty-two thousand, three hundred nine".