17218532985 has 16 divisors (see below), whose sum is σ = 27618364800. Its totient is φ = 9160313600.

The previous prime is 17218532971. The next prime is 17218533029. The reversal of 17218532985 is 58923581271.

It is not a de Polignac number, because 17218532985 - 2⁶ = 17218532921 is a prime.

It is a super-4 number, since 4×17218532985⁴ (a number of 42 digits) contains 4444 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1425285 + ... + 1437314.

It is an arithmetic number, because the mean of its divisors is an integer number (1726147800).

Almost surely, 2^17218532985 is an apocalyptic number.

17218532985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17218532985 is a deficient number, since it is larger than the sum of its proper divisors (10399831815).

17218532985 is a wasteful number, since it uses less digits than its factorization.

17218532985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863008.

The product of its digits is 1209600, while the sum is 51.

The spelling of 17218532985 in words is "seventeen billion, two hundred eighteen million, five hundred thirty-two thousand, nine hundred eighty-five".