420240550403 has 2 divisors, whose sum is σ = 420240550404. Its totient is φ = 420240550402.

The previous prime is 420240550349. The next prime is 420240550421. The reversal of 420240550403 is 304055042024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420240550403 - 2¹⁴ = 420240534019 is a prime.

It is not a weakly prime, because it can be changed into another prime (420240550703) 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 as a sum of consecutive naturals, namely, 210120275201 + 210120275202.

It is an arithmetic number, because the mean of its divisors is an integer number (210120275202).

Almost surely, 2^420240550403 is an apocalyptic number.

420240550403 is a deficient number, since it is larger than the sum of its proper divisors (1).

420240550403 is an equidigital number, since it uses as much as digits as its factorization.

420240550403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 29.

Adding to 420240550403 its reverse (304055042024), we get a palindrome (724295592427).

The spelling of 420240550403 in words is "four hundred twenty billion, two hundred forty million, five hundred fifty thousand, four hundred three".