16311812 has 12 divisors (see below), whose sum is σ = 31140816. Its totient is φ = 7414440.

The previous prime is 16311791. The next prime is 16311821. The reversal of 16311812 is 21811361.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185318 + ... + 185405.

It is an arithmetic number, because the mean of its divisors is an integer number (2595068).

Almost surely, 2^16311812 is an apocalyptic number.

It is an amenable number.

16311812 is a deficient number, since it is larger than the sum of its proper divisors (14829004).

16311812 is a wasteful number, since it uses less digits than its factorization.

16311812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370738 (or 370736 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 16311812 is about 4038.7884321910. The cubic root of 16311812 is about 253.6106005514.

It can be divided in two parts, 1631 and 1812, that added together give a palindrome (3443).

The spelling of 16311812 in words is "sixteen million, three hundred eleven thousand, eight hundred twelve".