13213724 has 12 divisors (see below), whose sum is σ = 23253048. Its totient is φ = 6570000.

The previous prime is 13213703. The next prime is 13213747. The reversal of 13213724 is 42731231.

It is a self number, because there is not a number n which added to its sum of digits gives 13213724.

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, 8402 + ... + 9849.

It is an arithmetic number, because the mean of its divisors is an integer number (1937754).

Almost surely, 2^13213724 is an apocalyptic number.

It is an amenable number.

13213724 is a deficient number, since it is larger than the sum of its proper divisors (10039324).

13213724 is a wasteful number, since it uses less digits than its factorization.

13213724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18436 (or 18434 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 13213724 is about 3635.0686375913. The cubic root of 13213724 is about 236.4150266778.

Adding to 13213724 its reverse (42731231), we get a palindrome (55944955).

The spelling of 13213724 in words is "thirteen million, two hundred thirteen thousand, seven hundred twenty-four".