2181840263 has 2 divisors, whose sum is σ = 2181840264. Its totient is φ = 2181840262.

The previous prime is 2181840211. The next prime is 2181840277. The reversal of 2181840263 is 3620481812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2181840263 - 2¹⁰ = 2181839239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181840203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090920131 + 1090920132.

It is an arithmetic number, because the mean of its divisors is an integer number (1090920132).

Almost surely, 2^2181840263 is an apocalyptic number.

2181840263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181840263 is an equidigital number, since it uses as much as digits as its factorization.

2181840263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 2181840263 is about 46710.1730140234. The cubic root of 2181840263 is about 1297.0030099242.

It can be divided in two parts, 218 and 1840263, that added together give a palindrome (1840481).

The spelling of 2181840263 in words is "two billion, one hundred eighty-one million, eight hundred forty thousand, two hundred sixty-three".