420022423 has 4 divisors (see below), whose sum is σ = 420118960. Its totient is φ = 419925888.

The previous prime is 420022391. The next prime is 420022489. The reversal of 420022423 is 324220024.

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 420022423 - 2⁵ = 420022391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420022423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420020423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41418 + ... + 50551.

It is an arithmetic number, because the mean of its divisors is an integer number (105029740).

Almost surely, 2^420022423 is an apocalyptic number.

420022423 is a deficient number, since it is larger than the sum of its proper divisors (96537).

420022423 is an equidigital number, since it uses as much as digits as its factorization.

420022423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96536.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 420022423 is about 20494.4485898011. The cubic root of 420022423 is about 748.9005657058.

Adding to 420022423 its reverse (324220024), we get a palindrome (744242447).

The spelling of 420022423 in words is "four hundred twenty million, twenty-two thousand, four hundred twenty-three".