20800331206693 has 2 divisors, whose sum is σ = 20800331206694. Its totient is φ = 20800331206692.

The previous prime is 20800331206643. The next prime is 20800331206729. The reversal of 20800331206693 is 39660213300802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18852807688324 + 1947523518369 = 4341982^2 + 1395537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20800331206693 - 2¹⁷ = 20800331075621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20800331206643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10400165603346 + 10400165603347.

It is an arithmetic number, because the mean of its divisors is an integer number (10400165603347).

Almost surely, 2^{20800331206693} is an apocalyptic number.

It is an amenable number.

20800331206693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20800331206693 is an equidigital number, since it uses as much as digits as its factorization.

20800331206693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 20800331206693 in words is "twenty trillion, eight hundred billion, three hundred thirty-one million, two hundred six thousand, six hundred ninety-three".