38266868021 has 2 divisors, whose sum is σ = 38266868022. Its totient is φ = 38266868020.

The previous prime is 38266868011. The next prime is 38266868023. The reversal of 38266868021 is 12086866283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19391955025 + 18874912996 = 139255^2 + 137386^2 .

It is a cyclic number.

It is not a de Polignac number, because 38266868021 - 2⁶ = 38266867957 is a prime.

Together with 38266868023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38266868023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19133434010 + 19133434011.

It is an arithmetic number, because the mean of its divisors is an integer number (19133434011).

Almost surely, 2^38266868021 is an apocalyptic number.

It is an amenable number.

38266868021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38266868021 is an equidigital number, since it uses as much as digits as its factorization.

38266868021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 38266868021 in words is "thirty-eight billion, two hundred sixty-six million, eight hundred sixty-eight thousand, twenty-one".