16809036 has 12 divisors (see below), whose sum is σ = 39221112. Its totient is φ = 5603008.

The previous prime is 16809031. The next prime is 16809043. The reversal of 16809036 is 63090861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×16809036³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16808988 and 16809006.

It is not an unprimeable number, because it can be changed into a prime (16809031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700365 + ... + 700388.

It is an arithmetic number, because the mean of its divisors is an integer number (3268426).

Almost surely, 2^16809036 is an apocalyptic number.

It is an amenable number.

16809036 is an abundant number, since it is smaller than the sum of its proper divisors (22412076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16809036 is a wasteful number, since it uses less digits than its factorization.

16809036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400760 (or 1400758 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 16809036 is about 4099.8824373389. The cubic root of 16809036 is about 256.1617426776.

Adding to 16809036 its reverse (63090861), we get a palindrome (79899897).

The spelling of 16809036 in words is "sixteen million, eight hundred nine thousand, thirty-six".