420930421805 has 16 divisors (see below), whose sum is σ = 506921384064. Its totient is φ = 335543186880.

The previous prime is 420930421771. The next prime is 420930421903. The reversal of 420930421805 is 508124039024.

It is not a de Polignac number, because 420930421805 - 2²⁰ = 420929373229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478774 + ... + 1740296.

It is an arithmetic number, because the mean of its divisors is an integer number (31682586504).

Almost surely, 2^420930421805 is an apocalyptic number.

It is an amenable number.

420930421805 is a deficient number, since it is larger than the sum of its proper divisors (85990962259).

420930421805 is a wasteful number, since it uses less digits than its factorization.

420930421805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262676.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 420930421805 in words is "four hundred twenty billion, nine hundred thirty million, four hundred twenty-one thousand, eight hundred five".