38242021 has 2 divisors, whose sum is σ = 38242022. Its totient is φ = 38242020.

The previous prime is 38242019. The next prime is 38242033. The reversal of 38242021 is 12024283.

38242021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20349121 + 17892900 = 4511^2 + 4230^2 .

It is a cyclic number.

It is not a de Polignac number, because 38242021 - 2¹ = 38242019 is a prime.

Together with 38242019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 38241983 and 38242001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38242081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19121010 + 19121011.

It is an arithmetic number, because the mean of its divisors is an integer number (19121011).

Almost surely, 2^38242021 is an apocalyptic number.

It is an amenable number.

38242021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38242021 is an equidigital number, since it uses as much as digits as its factorization.

38242021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 38242021 is about 6184.0133408653. The cubic root of 38242021 is about 336.9097751754.

The spelling of 38242021 in words is "thirty-eight million, two hundred forty-two thousand, twenty-one".