420455420020 has 12 divisors (see below), whose sum is σ = 882956382084. Its totient is φ = 168182168000.

The previous prime is 420455420017. The next prime is 420455420083. The reversal of 420455420020 is 20024554024.

It can be written as a sum of positive squares in 2 ways, for example, as 283558380004 + 136897040016 = 532502^2 + 369996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10511385481 + ... + 10511385520.

It is an arithmetic number, because the mean of its divisors is an integer number (73579698507).

Almost surely, 2^420455420020 is an apocalyptic number.

It is an amenable number.

420455420020 is an abundant number, since it is smaller than the sum of its proper divisors (462500962064).

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

420455420020 is a wasteful number, since it uses less digits than its factorization.

420455420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022771010 (or 21022771008 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 420455420020 its reverse (20024554024), we get a palindrome (440479974044).

The spelling of 420455420020 in words is "four hundred twenty billion, four hundred fifty-five million, four hundred twenty thousand, twenty".