16531836 has 12 divisors (see below), whose sum is σ = 38574312. Its totient is φ = 5510608.

The previous prime is 16531829. The next prime is 16531841. The reversal of 16531836 is 63813561.

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

It is a junction number, because it is equal to n+sod(n) for n = 16531797 and 16531806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688815 + ... + 688838.

It is an arithmetic number, because the mean of its divisors is an integer number (3214526).

Almost surely, 2^16531836 is an apocalyptic number.

It is an amenable number.

16531836 is an abundant number, since it is smaller than the sum of its proper divisors (22042476).

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

16531836 is a wasteful number, since it uses less digits than its factorization.

16531836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377660 (or 1377658 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 16531836 is about 4065.9360545882. The cubic root of 16531836 is about 254.7457981967.

The spelling of 16531836 in words is "sixteen million, five hundred thirty-one thousand, eight hundred thirty-six".