2127018681 has 6 divisors (see below), whose sum is σ = 3072360330. Its totient is φ = 1418012448.

The previous prime is 2127018643. The next prime is 2127018689. The reversal of 2127018681 is 1868107212.

It can be written as a sum of positive squares in only one way, i.e., 1923699600 + 203319081 = 43860^2 + 14259^2 .

It is not a de Polignac number, because 2127018681 - 2⁹ = 2127018169 is a prime.

It is a super-2 number, since 2×2127018681² = 9048416938645959522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2127018689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118167696 + ... + 118167713.

It is an arithmetic number, because the mean of its divisors is an integer number (512060055).

Almost surely, 2^2127018681 is an apocalyptic number.

It is an amenable number.

2127018681 is a deficient number, since it is larger than the sum of its proper divisors (945341649).

2127018681 is a wasteful number, since it uses less digits than its factorization.

2127018681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236335415 (or 236335412 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 2127018681 is about 46119.6127585651. The cubic root of 2127018681 is about 1286.0477721547.

The spelling of 2127018681 in words is "two billion, one hundred twenty-seven million, eighteen thousand, six hundred eighty-one".