20320245 has 24 divisors (see below), whose sum is σ = 38424672. Its totient is φ = 9852000.

The previous prime is 20320241. The next prime is 20320277. The reversal of 20320245 is 54202302.

It is not a de Polignac number, because 20320245 - 2² = 20320241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20031 + ... + 21020.

It is an arithmetic number, because the mean of its divisors is an integer number (1601028).

Almost surely, 2^20320245 is an apocalyptic number.

It is an amenable number.

20320245 is a deficient number, since it is larger than the sum of its proper divisors (18104427).

20320245 is a wasteful number, since it uses less digits than its factorization.

20320245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41073 (or 41070 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20320245 is about 4507.7982430450. The cubic root of 20320245 is about 272.8828946679.

Adding to 20320245 its reverse (54202302), we get a palindrome (74522547).

The spelling of 20320245 in words is "twenty million, three hundred twenty thousand, two hundred forty-five".