12513816 has 72 divisors (see below), whose sum is σ = 39436020. Its totient is φ = 3574368.

The previous prime is 12513793. The next prime is 12513847. The reversal of 12513816 is 61831521.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 12513816.

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 17 ways as a sum of consecutive naturals, for example, 1755 + ... + 5301.

Almost surely, 2^12513816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12513816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19718010).

12513816 is an abundant number, since it is smaller than the sum of its proper divisors (26922204).

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

12513816 is a wasteful number, since it uses less digits than its factorization.

12513816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573 (or 3559 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 12513816 is about 3537.4872437933. The cubic root of 12513816 is about 232.1649144530.

The spelling of 12513816 in words is "twelve million, five hundred thirteen thousand, eight hundred sixteen".