420320023 has 4 divisors (see below), whose sum is σ = 424176280. Its totient is φ = 416463768.

The previous prime is 420319967. The next prime is 420320027. The reversal of 420320023 is 320023024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420320023 - 2⁹ = 420319511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420319979 and 420320006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420320027) 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, 1927965 + ... + 1928182.

It is an arithmetic number, because the mean of its divisors is an integer number (106044070).

Almost surely, 2^420320023 is an apocalyptic number.

420320023 is a deficient number, since it is larger than the sum of its proper divisors (3856257).

420320023 is a wasteful number, since it uses less digits than its factorization.

420320023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856256.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 420320023 is about 20501.7078069121. The cubic root of 420320023 is about 749.0773976868.

Adding to 420320023 its reverse (320023024), we get a palindrome (740343047).

The spelling of 420320023 in words is "four hundred twenty million, three hundred twenty thousand, twenty-three".