42118019 has 2 divisors, whose sum is σ = 42118020. Its totient is φ = 42118018.

The previous prime is 42117997. The next prime is 42118031. The reversal of 42118019 is 91081124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42118019 - 2⁸ = 42117763 is a prime.

It is a super-2 number, since 2×42118019² = 3547855048968722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42118049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21059009 + 21059010.

It is an arithmetic number, because the mean of its divisors is an integer number (21059010).

Almost surely, 2^42118019 is an apocalyptic number.

42118019 is a deficient number, since it is larger than the sum of its proper divisors (1).

42118019 is an equidigital number, since it uses as much as digits as its factorization.

42118019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 42118019 is about 6489.8396744450. The cubic root of 42118019 is about 347.9279450721.

The spelling of 42118019 in words is "forty-two million, one hundred eighteen thousand, nineteen".