420423213243 has 16 divisors (see below), whose sum is σ = 638112704256. Its totient is φ = 243723601440.

The previous prime is 420423213211. The next prime is 420423213251. The reversal of 420423213243 is 342312324024.

It is not a de Polignac number, because 420423213243 - 2⁵ = 420423213211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420423213243.

It is not an unprimeable number, because it can be changed into a prime (420423213943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276957880 + ... + 276959397.

It is an arithmetic number, because the mean of its divisors is an integer number (39882044016).

Almost surely, 2^420423213243 is an apocalyptic number.

420423213243 is a deficient number, since it is larger than the sum of its proper divisors (217689491013).

420423213243 is a wasteful number, since it uses less digits than its factorization.

420423213243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553917314.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 420423213243 its reverse (342312324024), we get a palindrome (762735537267).

The spelling of 420423213243 in words is "four hundred twenty billion, four hundred twenty-three million, two hundred thirteen thousand, two hundred forty-three".