202820828242 has 8 divisors (see below), whose sum is σ = 304477188876. Its totient is φ = 101328431952.

The previous prime is 202820828239. The next prime is 202820828261. The reversal of 202820828242 is 242828028202.

It can be written as a sum of positive squares in 2 ways, for example, as 200631430561 + 2189397681 = 447919^2 + 46791^2 .

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

It is a super-2 number, since 2×202820828242² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202820828195 and 202820828204.

It is an unprimeable number.

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, 40987993 + ... + 40992940.

Almost surely, 2^202820828242 is an apocalyptic number.

202820828242 is a deficient number, since it is larger than the sum of its proper divisors (101656360634).

202820828242 is a wasteful number, since it uses less digits than its factorization.

202820828242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81982172.

The product of its (nonzero) digits is 131072, while the sum is 40.

The spelling of 202820828242 in words is "two hundred two billion, eight hundred twenty million, eight hundred twenty-eight thousand, two hundred forty-two".