2118271405 has 16 divisors (see below), whose sum is σ = 2591740800. Its totient is φ = 1661453248.

The previous prime is 2118271399. The next prime is 2118271409. The reversal of 2118271405 is 5041728112.

It is a cyclic number.

It is not a de Polignac number, because 2118271405 - 2¹¹ = 2118269357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118271409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640446 + ... + 643744.

It is an arithmetic number, because the mean of its divisors is an integer number (161983800).

Almost surely, 2^2118271405 is an apocalyptic number.

It is an amenable number.

2118271405 is a deficient number, since it is larger than the sum of its proper divisors (473469395).

2118271405 is a wasteful number, since it uses less digits than its factorization.

2118271405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2118271405 is about 46024.6825627293. The cubic root of 2118271405 is about 1284.2824105935.

Adding to 2118271405 its reverse (5041728112), we get a palindrome (7159999517).

The spelling of 2118271405 in words is "two billion, one hundred eighteen million, two hundred seventy-one thousand, four hundred five".