420205533 has 12 divisors (see below), whose sum is σ = 615838944. Its totient is φ = 254669800.

The previous prime is 420205523. The next prime is 420205601. The reversal of 420205533 is 335502024.

It is not a de Polignac number, because 420205533 - 2²⁰ = 419156957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420205523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 578433 + ... + 579158.

It is an arithmetic number, because the mean of its divisors is an integer number (51319912).

Almost surely, 2^420205533 is an apocalyptic number.

It is an amenable number.

420205533 is a deficient number, since it is larger than the sum of its proper divisors (195633411).

420205533 is a wasteful number, since it uses less digits than its factorization.

420205533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157616 (or 1157605 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 420205533 is about 20498.9154103333. The cubic root of 420205533 is about 749.0093783566.

Adding to 420205533 its reverse (335502024), we get a palindrome (755707557).

The spelling of 420205533 in words is "four hundred twenty million, two hundred five thousand, five hundred thirty-three".