17983889917 has 16 divisors (see below), whose sum is σ = 20714158080. Its totient is φ = 15294050928.

The previous prime is 17983889893. The next prime is 17983889927. The reversal of 17983889917 is 71998838971.

It is a cyclic number.

It is not a de Polignac number, because 17983889917 - 2¹⁵ = 17983857149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17983889927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1792128 + ... + 1802134.

It is an arithmetic number, because the mean of its divisors is an integer number (1294634880).

Almost surely, 2^17983889917 is an apocalyptic number.

It is an amenable number.

17983889917 is a deficient number, since it is larger than the sum of its proper divisors (2730268163).

17983889917 is a wasteful number, since it uses less digits than its factorization.

17983889917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12000.

The product of its digits is 54867456, while the sum is 70.

The spelling of 17983889917 in words is "seventeen billion, nine hundred eighty-three million, eight hundred eighty-nine thousand, nine hundred seventeen".