420020431 has 8 divisors (see below), whose sum is σ = 430073600. Its totient is φ = 409980312.

The previous prime is 420020423. The next prime is 420020443. The reversal of 420020431 is 134020024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420020431 - 2³ = 420020423 is a prime.

It is a super-2 number, since 2×420020431² = 352834324914851522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420020131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100420 + ... + 104518.

It is an arithmetic number, because the mean of its divisors is an integer number (53759200).

Almost surely, 2^420020431 is an apocalyptic number.

420020431 is a deficient number, since it is larger than the sum of its proper divisors (10053169).

420020431 is a wasteful number, since it uses less digits than its factorization.

420020431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6525.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 420020431 is about 20494.3999912171. The cubic root of 420020431 is about 748.8993817910.

Adding to 420020431 its reverse (134020024), we get a palindrome (554040455).

The spelling of 420020431 in words is "four hundred twenty million, twenty thousand, four hundred thirty-one".