16905085 has 4 divisors (see below), whose sum is σ = 20286108. Its totient is φ = 13524064.

The previous prime is 16905073. The next prime is 16905103. The reversal of 16905085 is 58050961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58050961 = 673 ⋅86257.

It can be written as a sum of positive squares in 2 ways, for example, as 5331481 + 11573604 = 2309^2 + 3402^2 .

It is a cyclic number.

It is not a de Polignac number, because 16905085 - 2¹¹ = 16903037 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 16905085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1690504 + ... + 1690513.

It is an arithmetic number, because the mean of its divisors is an integer number (5071527).

Almost surely, 2^16905085 is an apocalyptic number.

It is an amenable number.

16905085 is a deficient number, since it is larger than the sum of its proper divisors (3381023).

16905085 is an equidigital number, since it uses as much as digits as its factorization.

16905085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381022.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 16905085 is about 4111.5793802382. The cubic root of 16905085 is about 256.6487300297.

The spelling of 16905085 in words is "sixteen million, nine hundred five thousand, eighty-five".