420020113 has 4 divisors (see below), whose sum is σ = 430264548. Its totient is φ = 409775680.

The previous prime is 420020077. The next prime is 420020131. The reversal of 420020113 is 311020024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147671104 + 272349009 = 12152^2 + 16503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420020113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420020093 and 420020102.

It is not an unprimeable number, because it can be changed into a prime (420020413) 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, 5122156 + ... + 5122237.

It is an arithmetic number, because the mean of its divisors is an integer number (107566137).

Almost surely, 2^420020113 is an apocalyptic number.

It is an amenable number.

420020113 is a deficient number, since it is larger than the sum of its proper divisors (10244435).

420020113 is a wasteful number, since it uses less digits than its factorization.

420020113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244434.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 420020113 is about 20494.3922329988. The cubic root of 420020113 is about 748.8991927922.

Adding to 420020113 its reverse (311020024), we get a palindrome (731040137).

The spelling of 420020113 in words is "four hundred twenty million, twenty thousand, one hundred thirteen".