20038738423321 has 2 divisors, whose sum is σ = 20038738423322. Its totient is φ = 20038738423320.

The previous prime is 20038738423309. The next prime is 20038738423351. The reversal of 20038738423321 is 12332483783002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17331726333321 + 2707012090000 = 4163139^2 + 1645300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20038738423321 is a prime.

It is a super-5 number, since 5×20038738423321⁵ (a number of 68 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (20038738423351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019369211660 + 10019369211661.

It is an arithmetic number, because the mean of its divisors is an integer number (10019369211661).

Almost surely, 2^{20038738423321} is an apocalyptic number.

It is an amenable number.

20038738423321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20038738423321 is an equidigital number, since it uses as much as digits as its factorization.

20038738423321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 20038738423321 in words is "twenty trillion, thirty-eight billion, seven hundred thirty-eight million, four hundred twenty-three thousand, three hundred twenty-one".