420423430433 has 16 divisors (see below), whose sum is σ = 435162663936. Its totient is φ = 405759309120.

The previous prime is 420423430379. The next prime is 420423430439. The reversal of 420423430433 is 334034324024.

It is a cyclic number.

It is not a de Polignac number, because 420423430433 - 2²⁰ = 420422381857 is a prime.

It is a super-3 number, since 3×420423430433³ (a number of 36 digits) contains 333 as substring.

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 420423430433.

It is not an unprimeable number, because it can be changed into a prime (420423430439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17409035 + ... + 17433167.

It is an arithmetic number, because the mean of its divisors is an integer number (27197666496).

Almost surely, 2^420423430433 is an apocalyptic number.

It is an amenable number.

420423430433 is a deficient number, since it is larger than the sum of its proper divisors (14739233503).

420423430433 is a wasteful number, since it uses less digits than its factorization.

420423430433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25664.

The product of its (nonzero) digits is 82944, while the sum is 32.

Adding to 420423430433 its reverse (334034324024), we get a palindrome (754457754457).

The spelling of 420423430433 in words is "four hundred twenty billion, four hundred twenty-three million, four hundred thirty thousand, four hundred thirty-three".