420020033 has 4 divisors (see below), whose sum is σ = 420137940. Its totient is φ = 419902128.

The previous prime is 420020009. The next prime is 420020039. The reversal of 420020033 is 330020024.

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 340328704 + 79691329 = 18448^2 + 8927^2 .

It is a cyclic number.

It is not a de Polignac number, because 420020033 - 2¹⁶ = 419954497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420020039) 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, 53438 + ... + 60791.

It is an arithmetic number, because the mean of its divisors is an integer number (105034485).

Almost surely, 2^420020033 is an apocalyptic number.

It is an amenable number.

420020033 is a deficient number, since it is larger than the sum of its proper divisors (117907).

420020033 is a wasteful number, since it uses less digits than its factorization.

420020033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117906.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 420020033 is about 20494.3902812453. The cubic root of 420020033 is about 748.8991452453.

Adding to 420020033 its reverse (330020024), we get a palindrome (750040057).

Subtracting from 420020033 its reverse (330020024), we obtain a palindrome (90000009).

The spelling of 420020033 in words is "four hundred twenty million, twenty thousand, thirty-three".