16809513 has 16 divisors (see below), whose sum is σ = 26050560. Its totient is φ = 9441936.

The previous prime is 16809511. The next prime is 16809523. The reversal of 16809513 is 31590861.

It is not a de Polignac number, because 16809513 - 2¹ = 16809511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16809511) 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, 5545 + ... + 8022.

It is an arithmetic number, because the mean of its divisors is an integer number (1628160).

Almost surely, 2^16809513 is an apocalyptic number.

It is an amenable number.

16809513 is a deficient number, since it is larger than the sum of its proper divisors (9241047).

16809513 is a wasteful number, since it uses less digits than its factorization.

16809513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13636.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 16809513 is about 4099.9406093259. The cubic root of 16809513 is about 256.1641657393.

The spelling of 16809513 in words is "sixteen million, eight hundred nine thousand, five hundred thirteen".