2118786469 has 2 divisors, whose sum is σ = 2118786470. Its totient is φ = 2118786468.

The previous prime is 2118786457. The next prime is 2118786541. The reversal of 2118786469 is 9646878112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1965769569 + 153016900 = 44337^2 + 12370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118786469 - 2⁵ = 2118786437 is a prime.

It is a super-2 number, since 2×2118786469² = 8978512202434975922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118786409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059393234 + 1059393235.

It is an arithmetic number, because the mean of its divisors is an integer number (1059393235).

Almost surely, 2^2118786469 is an apocalyptic number.

It is an amenable number.

2118786469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118786469 is an equidigital number, since it uses as much as digits as its factorization.

2118786469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 2118786469 is about 46030.2777419385. The cubic root of 2118786469 is about 1284.3864945220.

The spelling of 2118786469 in words is "two billion, one hundred eighteen million, seven hundred eighty-six thousand, four hundred sixty-nine".