420343454423 has 4 divisors (see below), whose sum is σ = 420605026320. Its totient is φ = 420081882528.

The previous prime is 420343454417. The next prime is 420343454473. The reversal of 420343454423 is 324454343024.

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 420343454423 - 2⁶ = 420343454359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420343454473) 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, 130783538 + ... + 130786751.

It is an arithmetic number, because the mean of its divisors is an integer number (105151256580).

Almost surely, 2^420343454423 is an apocalyptic number.

420343454423 is a deficient number, since it is larger than the sum of its proper divisors (261571897).

420343454423 is a wasteful number, since it uses less digits than its factorization.

420343454423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261571896.

The product of its (nonzero) digits is 552960, while the sum is 38.

Adding to 420343454423 its reverse (324454343024), we get a palindrome (744797797447).

The spelling of 420343454423 in words is "four hundred twenty billion, three hundred forty-three million, four hundred fifty-four thousand, four hundred twenty-three".