2118896309 has 2 divisors, whose sum is σ = 2118896310. Its totient is φ = 2118896308.

The previous prime is 2118896291. The next prime is 2118896399. The reversal of 2118896309 is 9036988112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2016279409 + 102616900 = 44903^2 + 10130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118896309 - 2¹² = 2118892213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118896399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059448154 + 1059448155.

It is an arithmetic number, because the mean of its divisors is an integer number (1059448155).

Almost surely, 2^2118896309 is an apocalyptic number.

It is an amenable number.

2118896309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118896309 is an equidigital number, since it uses as much as digits as its factorization.

2118896309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 2118896309 is about 46031.4708541884. The cubic root of 2118896309 is about 1284.4086887634.

The spelling of 2118896309 in words is "two billion, one hundred eighteen million, eight hundred ninety-six thousand, three hundred nine".