16985309293 has 16 divisors (see below), whose sum is σ = 18731530240. Its totient is φ = 15339812400.

The previous prime is 16985309269. The next prime is 16985309303. The reversal of 16985309293 is 39290358961.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16985309293 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 (16985309233) 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, 175743 + ... + 254668.

It is an arithmetic number, because the mean of its divisors is an integer number (1170720640).

Almost surely, 2^16985309293 is an apocalyptic number.

It is an amenable number.

16985309293 is a deficient number, since it is larger than the sum of its proper divisors (1746220947).

16985309293 is a wasteful number, since it uses less digits than its factorization.

16985309293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430528.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 16985309293 in words is "sixteen billion, nine hundred eighty-five million, three hundred nine thousand, two hundred ninety-three".