420443023 has 32 divisors (see below), whose sum is σ = 573027840. Its totient is φ = 297855360.

The previous prime is 420443003. The next prime is 420443029. The reversal of 420443023 is 320344024.

It is not a de Polignac number, because 420443023 - 2⁵ = 420442991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420442985 and 420443003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420443029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63933 + ... + 70201.

It is an arithmetic number, because the mean of its divisors is an integer number (17907120).

Almost surely, 2^420443023 is an apocalyptic number.

420443023 is a deficient number, since it is larger than the sum of its proper divisors (152584817).

420443023 is a wasteful number, since it uses less digits than its factorization.

420443023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367.

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

The square root of 420443023 is about 20504.7073375847. The cubic root of 420443023 is about 749.1504591074.

Adding to 420443023 its reverse (320344024), we get a palindrome (740787047).

The spelling of 420443023 in words is "four hundred twenty million, four hundred forty-three thousand, twenty-three".