20364224 has 14 divisors (see below), whose sum is σ = 40410384. Its totient is φ = 10182080.

The previous prime is 20364221. The next prime is 20364247. The reversal of 20364224 is 42246302.

It is a self number, because there is not a number n which added to its sum of digits gives 20364224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20364221) by changing a digit.

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 as a sum of consecutive naturals, namely, 159032 + ... + 159159.

It is an arithmetic number, because the mean of its divisors is an integer number (2886456).

Almost surely, 2^20364224 is an apocalyptic number.

It is an amenable number.

20364224 is a deficient number, since it is larger than the sum of its proper divisors (20046160).

20364224 is an equidigital number, since it uses as much as digits as its factorization.

20364224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318203 (or 318193 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 20364224 is about 4512.6737085679. The cubic root of 20364224 is about 273.0796191535.

The spelling of 20364224 in words is "twenty million, three hundred sixty-four thousand, two hundred twenty-four".