420020011 has 4 divisors (see below), whose sum is σ = 425336800. Its totient is φ = 414703224.

The previous prime is 420020009. The next prime is 420020039. The reversal of 420020011 is 110020024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420020011 - 2¹ = 420020009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420020011.

It is not an unprimeable number, because it can be changed into a prime (420020911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2658276 + ... + 2658433.

It is an arithmetic number, because the mean of its divisors is an integer number (106334200).

Almost surely, 2^420020011 is an apocalyptic number.

420020011 is a deficient number, since it is larger than the sum of its proper divisors (5316789).

420020011 is an equidigital number, since it uses as much as digits as its factorization.

420020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316788.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 420020011 is about 20494.3897445130. The cubic root of 420020011 is about 748.8991321699.

Adding to 420020011 its reverse (110020024), we get a palindrome (530040035).

The spelling of 420020011 in words is "four hundred twenty million, twenty thousand, eleven".