320420423 has 4 divisors (see below), whose sum is σ = 320816328. Its totient is φ = 320024520.

The previous prime is 320420417. The next prime is 320420431. The reversal of 320420423 is 324024023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324024023 = 23 ⋅14088001.

It is a cyclic number.

It is not a de Polignac number, because 320420423 - 2¹⁴ = 320404039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320420395 and 320420404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320420413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196736 + ... + 198357.

It is an arithmetic number, because the mean of its divisors is an integer number (80204082).

Almost surely, 2^320420423 is an apocalyptic number.

320420423 is a deficient number, since it is larger than the sum of its proper divisors (395905).

320420423 is an equidigital number, since it uses as much as digits as its factorization.

320420423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395904.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 320420423 is about 17900.2911428837. The cubic root of 320420423 is about 684.2897947564.

Adding to 320420423 its reverse (324024023), we get a palindrome (644444446).

The spelling of 320420423 in words is "three hundred twenty million, four hundred twenty thousand, four hundred twenty-three".