12811916 has 24 divisors (see below), whose sum is σ = 24801840. Its totient is φ = 5752512.

The previous prime is 12811907. The next prime is 12811927. The reversal of 12811916 is 61911821.

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 7 ways as a sum of consecutive naturals, for example, 1406 + ... + 5253.

It is an arithmetic number, because the mean of its divisors is an integer number (1033410).

Almost surely, 2^12811916 is an apocalyptic number.

It is an amenable number.

12811916 is a deficient number, since it is larger than the sum of its proper divisors (11989924).

12811916 is a wasteful number, since it uses less digits than its factorization.

12811916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713 (or 6711 counting only the distinct ones).

The product of its digits is 864, while the sum is 29.

The square root of 12811916 is about 3579.3736882309. The cubic root of 12811916 is about 233.9939852838.

The spelling of 12811916 in words is "twelve million, eight hundred eleven thousand, nine hundred sixteen".