420423423 has 8 divisors (see below), whose sum is σ = 640645248. Its totient is φ = 240241944.

The previous prime is 420423347. The next prime is 420423499. The reversal of 420423423 is 324324024.

It is an interprime number because it is at equal distance from previous prime (420423347) and next prime (420423499).

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

It is not a de Polignac number, because 420423423 - 2¹⁶ = 420357887 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 420423393 and 420423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420423323) 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, 10010061 + ... + 10010102.

It is an arithmetic number, because the mean of its divisors is an integer number (80080656).

Almost surely, 2^420423423 is an apocalyptic number.

420423423 is a deficient number, since it is larger than the sum of its proper divisors (220221825).

420423423 is a wasteful number, since it uses less digits than its factorization.

420423423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020173.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 420423423 is about 20504.2293929813. The cubic root of 420423423 is about 749.1388177542.

Adding to 420423423 its reverse (324324024), we get a palindrome (744747447).

The spelling of 420423423 in words is "four hundred twenty million, four hundred twenty-three thousand, four hundred twenty-three".