202420442401 has 4 divisors (see below), whose sum is σ = 207357526404. Its totient is φ = 197483358400.

The previous prime is 202420442387. The next prime is 202420442479. The reversal of 202420442401 is 104244024202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104244024202 = 2 ⋅52122012101.

It can be written as a sum of positive squares in 2 ways, for example, as 7568826001 + 194851616400 = 86999^2 + 441420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202420442401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202420442201) 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 3 ways as a sum of consecutive naturals, for example, 2468541940 + ... + 2468542021.

It is an arithmetic number, because the mean of its divisors is an integer number (51839381601).

Almost surely, 2^202420442401 is an apocalyptic number.

It is an amenable number.

202420442401 is a deficient number, since it is larger than the sum of its proper divisors (4937084003).

202420442401 is an equidigital number, since it uses as much as digits as its factorization.

202420442401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937084002.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 202420442401 its reverse (104244024202), we get a palindrome (306664466603).

The spelling of 202420442401 in words is "two hundred two billion, four hundred twenty million, four hundred forty-two thousand, four hundred one".