13838021 has 2 divisors, whose sum is σ = 13838022. Its totient is φ = 13838020.

The previous prime is 13837981. The next prime is 13838063. The reversal of 13838021 is 12083831.

13838021 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., 7761796 + 6076225 = 2786^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 13838021 - 2¹⁴ = 13821637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13838621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6919010 + 6919011.

It is an arithmetic number, because the mean of its divisors is an integer number (6919011).

Almost surely, 2^13838021 is an apocalyptic number.

It is an amenable number.

13838021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13838021 is an equidigital number, since it uses as much as digits as its factorization.

13838021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 13838021 is about 3719.9490587910. The cubic root of 13838021 is about 240.0811126296.

The spelling of 13838021 in words is "thirteen million, eight hundred thirty-eight thousand, twenty-one".