20200011993809 has 2 divisors, whose sum is σ = 20200011993810. Its totient is φ = 20200011993808.

The previous prime is 20200011993787. The next prime is 20200011993823. The reversal of 20200011993809 is 90839911000202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15439555662400 + 4760456331409 = 3929320^2 + 2181847^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200011993809 - 2¹⁶ = 20200011928273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200011993809.

It is not a weakly prime, because it can be changed into another prime (20200011953809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100005996904 + 10100005996905.

It is an arithmetic number, because the mean of its divisors is an integer number (10100005996905).

Almost surely, 2^{20200011993809} is an apocalyptic number.

It is an amenable number.

20200011993809 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200011993809 is an equidigital number, since it uses as much as digits as its factorization.

20200011993809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 20200011993809 in words is "twenty trillion, two hundred billion, eleven million, nine hundred ninety-three thousand, eight hundred nine".