12816819 has 16 divisors (see below), whose sum is σ = 19814400. Its totient is φ = 8172648.

The previous prime is 12816751. The next prime is 12816821. The reversal of 12816819 is 91861821.

12816819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12816819 - 2¹¹ = 12814771 is a prime.

It is a super-2 number, since 2×12816819² = 328541698557522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12816889) 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, 9699 + ... + 10940.

It is an arithmetic number, because the mean of its divisors is an integer number (1238400).

Almost surely, 2^12816819 is an apocalyptic number.

12816819 is a deficient number, since it is larger than the sum of its proper divisors (6997581).

12816819 is a wasteful number, since it uses less digits than its factorization.

12816819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20671 (or 20665 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 12816819 is about 3580.0585190748. The cubic root of 12816819 is about 234.0238305776.

It can be divided in two parts, 1281 and 6819, that added together give a square (8100 = 90²).

The spelling of 12816819 in words is "twelve million, eight hundred sixteen thousand, eight hundred nineteen".