20320207 has 8 divisors (see below), whose sum is σ = 20699280. Its totient is φ = 19944000.

The previous prime is 20320189. The next prime is 20320211. The reversal of 20320207 is 70202302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17769 + ... + 18877.

It is an arithmetic number, because the mean of its divisors is an integer number (2587410).

Almost surely, 2^20320207 is an apocalyptic number.

20320207 is a deficient number, since it is larger than the sum of its proper divisors (379073).

20320207 is a wasteful number, since it uses less digits than its factorization.

20320207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20320207 is about 4507.7940281251. The cubic root of 20320207 is about 272.8827245657.

Adding to 20320207 its reverse (70202302), we get a palindrome (90522509).

The spelling of 20320207 in words is "twenty million, three hundred twenty thousand, two hundred seven".