242020819 has 2 divisors, whose sum is σ = 242020820. Its totient is φ = 242020818.

The previous prime is 242020787. The next prime is 242020829. The reversal of 242020819 is 918020242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242020819 - 2⁵ = 242020787 is a prime.

It is a super-2 number, since 2×242020819² = 117148153658861522, which contains 22 as substring.

It is equal to p_13266352 and since 242020819 and 13266352 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (242020829) 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, 121010409 + 121010410.

It is an arithmetic number, because the mean of its divisors is an integer number (121010410).

Almost surely, 2^242020819 is an apocalyptic number.

242020819 is a deficient number, since it is larger than the sum of its proper divisors (1).

242020819 is an equidigital number, since it uses as much as digits as its factorization.

242020819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 242020819 is about 15557.0183197167. The cubic root of 242020819 is about 623.1858380815.

The spelling of 242020819 in words is "two hundred forty-two million, twenty thousand, eight hundred nineteen".