420242444020 has 48 divisors (see below), whose sum is σ = 1013862463488. Its totient is φ = 143328752640.

The previous prime is 420242443981. The next prime is 420242444077. The reversal of 420242444020 is 20444242024.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 420242444020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7831197 + ... + 7884676.

It is an arithmetic number, because the mean of its divisors is an integer number (21122134656).

Almost surely, 2^420242444020 is an apocalyptic number.

It is an amenable number.

420242444020 is an abundant number, since it is smaller than the sum of its proper divisors (593620019468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420242444020 is a wasteful number, since it uses less digits than its factorization.

420242444020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15716080 (or 15716078 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 420242444020 its reverse (20444242024), we get a palindrome (440686686044).

The spelling of 420242444020 in words is "four hundred twenty billion, two hundred forty-two million, four hundred forty-four thousand, twenty".