20038218209 has 2 divisors, whose sum is σ = 20038218210. Its totient is φ = 20038218208.

The previous prime is 20038218199. The next prime is 20038218251. The reversal of 20038218209 is 90281283002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10439117584 + 9599100625 = 102172^2 + 97975^2 .

It is a cyclic number.

It is not a de Polignac number, because 20038218209 - 2¹² = 20038214113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20038218259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019109104 + 10019109105.

It is an arithmetic number, because the mean of its divisors is an integer number (10019109105).

Almost surely, 2^20038218209 is an apocalyptic number.

It is an amenable number.

20038218209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20038218209 is an equidigital number, since it uses as much as digits as its factorization.

20038218209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 20038218209 in words is "twenty billion, thirty-eight million, two hundred eighteen thousand, two hundred nine".