420500423 has 16 divisors (see below), whose sum is σ = 511282944. Its totient is φ = 337599360.

The previous prime is 420500413. The next prime is 420500497. The reversal of 420500423 is 324005024.

It is not a de Polignac number, because 420500423 - 2⁶ = 420500359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420500395 and 420500404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420500413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16736 + ... + 33482.

It is an arithmetic number, because the mean of its divisors is an integer number (31955184).

Almost surely, 2^420500423 is an apocalyptic number.

420500423 is a deficient number, since it is larger than the sum of its proper divisors (90782521).

420500423 is a wasteful number, since it uses less digits than its factorization.

420500423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16982.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 420500423 is about 20506.1069684131. The cubic root of 420500423 is about 749.1845495606.

Adding to 420500423 its reverse (324005024), we get a palindrome (744505447).

The spelling of 420500423 in words is "four hundred twenty million, five hundred thousand, four hundred twenty-three".