20040555333109 has 2 divisors, whose sum is σ = 20040555333110. Its totient is φ = 20040555333108.

The previous prime is 20040555333107. The next prime is 20040555333157. The reversal of 20040555333109 is 90133355504002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15400106944209 + 4640448388900 = 3924297^2 + 2154170^2 .

It is a cyclic number.

It is not a de Polignac number, because 20040555333109 - 2¹ = 20040555333107 is a prime.

Together with 20040555333107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20040555333103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020277666554 + 10020277666555.

It is an arithmetic number, because the mean of its divisors is an integer number (10020277666555).

Almost surely, 2^{20040555333109} is an apocalyptic number.

It is an amenable number.

20040555333109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040555333109 is an equidigital number, since it uses as much as digits as its factorization.

20040555333109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 40.

The spelling of 20040555333109 in words is "twenty trillion, forty billion, five hundred fifty-five million, three hundred thirty-three thousand, one hundred nine".