20613324 has 24 divisors (see below), whose sum is σ = 49272048. Its totient is φ = 6703360.

The previous prime is 20613323. The next prime is 20613331. The reversal of 20613324 is 42331602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20613324.

It is not an unprimeable number, because it can be changed into a prime (20613323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20457 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (2053002).

Almost surely, 2^20613324 is an apocalyptic number.

It is an amenable number.

20613324 is an abundant number, since it is smaller than the sum of its proper divisors (28658724).

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

20613324 is a wasteful number, since it uses less digits than its factorization.

20613324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41945 (or 41943 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20613324 is about 4540.1898638713. The cubic root of 20613324 is about 274.1885678723.

Adding to 20613324 its reverse (42331602), we get a palindrome (62944926).

It can be divided in two parts, 206 and 13324, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 20613324 in words is "twenty million, six hundred thirteen thousand, three hundred twenty-four".