13220824 has 16 divisors (see below), whose sum is σ = 24829200. Its totient is φ = 6599712.

The previous prime is 13220773. The next prime is 13220843. The reversal of 13220824 is 42802231.

It is a junction number, because it is equal to n+sod(n) for n = 13220795 and 13220804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6882 + ... + 8590.

It is an arithmetic number, because the mean of its divisors is an integer number (1551825).

Almost surely, 2^13220824 is an apocalyptic number.

It is an amenable number.

13220824 is a deficient number, since it is larger than the sum of its proper divisors (11608376).

13220824 is a wasteful number, since it uses less digits than its factorization.

13220824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682 (or 2678 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 13220824 is about 3636.0451042307. The cubic root of 13220824 is about 236.4573626143.

The spelling of 13220824 in words is "thirteen million, two hundred twenty thousand, eight hundred twenty-four".