420203402423 has 4 divisors (see below), whose sum is σ = 480232459920. Its totient is φ = 360174344928.

The previous prime is 420203402419. The next prime is 420203402459. The reversal of 420203402423 is 324204302024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 420203402423 - 2² = 420203402419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420203402392 and 420203402401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420203402623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30014528738 + ... + 30014528751.

It is an arithmetic number, because the mean of its divisors is an integer number (120058114980).

Almost surely, 2^420203402423 is an apocalyptic number.

420203402423 is a deficient number, since it is larger than the sum of its proper divisors (60029057497).

420203402423 is an equidigital number, since it uses as much as digits as its factorization.

420203402423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60029057496.

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 420203402423 its reverse (324204302024), we get a palindrome (744407704447).

It can be divided in two parts, 42020 and 3402423, that added together give a palindrome (3444443).

The spelling of 420203402423 in words is "four hundred twenty billion, two hundred three million, four hundred two thousand, four hundred twenty-three".