420304240423 has 4 divisors (see below), whose sum is σ = 424465668648. Its totient is φ = 416142812200.

The previous prime is 420304240397. The next prime is 420304240451. The reversal of 420304240423 is 324042403024.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420304240423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420304240391 and 420304240400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420304240463) 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, 2080713961 + ... + 2080714162.

It is an arithmetic number, because the mean of its divisors is an integer number (106116417162).

Almost surely, 2^420304240423 is an apocalyptic number.

420304240423 is a deficient number, since it is larger than the sum of its proper divisors (4161428225).

420304240423 is a wasteful number, since it uses less digits than its factorization.

420304240423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161428224.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 420304240423 its reverse (324042403024), we get a palindrome (744346643447).

The spelling of 420304240423 in words is "four hundred twenty billion, three hundred four million, two hundred forty thousand, four hundred twenty-three".