20016233307209 has 2 divisors, whose sum is σ = 20016233307210. Its totient is φ = 20016233307208.

The previous prime is 20016233307079. The next prime is 20016233307263. The reversal of 20016233307209 is 90270333261002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13530832551184 + 6485400756025 = 3678428^2 + 2546645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20016233307209 - 2¹² = 20016233303113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20016233300209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008116653604 + 10008116653605.

It is an arithmetic number, because the mean of its divisors is an integer number (10008116653605).

Almost surely, 2^{20016233307209} is an apocalyptic number.

It is an amenable number.

20016233307209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016233307209 is an equidigital number, since it uses as much as digits as its factorization.

20016233307209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 38.

The spelling of 20016233307209 in words is "twenty trillion, sixteen billion, two hundred thirty-three million, three hundred seven thousand, two hundred nine".