20840380333 has 2 divisors, whose sum is σ = 20840380334. Its totient is φ = 20840380332.

The previous prime is 20840380303. The next prime is 20840380409. The reversal of 20840380333 is 33308304802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13609088964 + 7231291369 = 116658^2 + 85037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20840380333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20840380303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10420190166 + 10420190167.

It is an arithmetic number, because the mean of its divisors is an integer number (10420190167).

Almost surely, 2^20840380333 is an apocalyptic number.

It is an amenable number.

20840380333 is a deficient number, since it is larger than the sum of its proper divisors (1).

20840380333 is an equidigital number, since it uses as much as digits as its factorization.

20840380333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 20840380333 in words is "twenty billion, eight hundred forty million, three hundred eighty thousand, three hundred thirty-three".