38305021 has 2 divisors, whose sum is σ = 38305022. Its totient is φ = 38305020.

The previous prime is 38305013. The next prime is 38305031. The reversal of 38305021 is 12050383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 1265625 = 6086^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 38305021 - 2³ = 38305013 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38304983 and 38305001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38305031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19152510 + 19152511.

It is an arithmetic number, because the mean of its divisors is an integer number (19152511).

Almost surely, 2^38305021 is an apocalyptic number.

It is an amenable number.

38305021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38305021 is an equidigital number, since it uses as much as digits as its factorization.

38305021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 38305021 is about 6189.1050241533. The cubic root of 38305021 is about 337.0946823394.

The spelling of 38305021 in words is "thirty-eight million, three hundred five thousand, twenty-one".