420344023 has 16 divisors (see below), whose sum is σ = 489265920. Its totient is φ = 356886400.

The previous prime is 420344017. The next prime is 420344039. The reversal of 420344023 is 320443024.

It is a cyclic number.

It is not a de Polignac number, because 420344023 - 2¹⁷ = 420212951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420343985 and 420344003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420344623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15918 + ... + 33076.

It is an arithmetic number, because the mean of its divisors is an integer number (30579120).

Almost surely, 2^420344023 is an apocalyptic number.

420344023 is a deficient number, since it is larger than the sum of its proper divisors (68921897).

420344023 is a wasteful number, since it uses less digits than its factorization.

420344023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17318.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 420344023 is about 20502.2931156493. The cubic root of 420344023 is about 749.0916546929.

Adding to 420344023 its reverse (320443024), we get a palindrome (740787047).

Subtracting from 420344023 its reverse (320443024), we obtain a palindrome (99900999).

It can be divided in two parts, 420 and 344023, that added together give a palindrome (344443).

The spelling of 420344023 in words is "four hundred twenty million, three hundred forty-four thousand, twenty-three".