2018481868221 has 32 divisors (see below), whose sum is σ = 3456397056000. Its totient is φ = 1018402697664.

The previous prime is 2018481868211. The next prime is 2018481868279. The reversal of 2018481868221 is 1228681848102.

It is not a de Polignac number, because 2018481868221 - 2¹⁰ = 2018481867197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018481868211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160726471 + ... + 160739028.

It is an arithmetic number, because the mean of its divisors is an integer number (108012408000).

Almost surely, 2^{2018481868221} is an apocalyptic number.

2018481868221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2018481868221 is a deficient number, since it is larger than the sum of its proper divisors (1437915187779).

2018481868221 is a wasteful number, since it uses less digits than its factorization.

2018481868221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321465545.

The product of its (nonzero) digits is 786432, while the sum is 51.

The spelling of 2018481868221 in words is "two trillion, eighteen billion, four hundred eighty-one million, eight hundred sixty-eight thousand, two hundred twenty-one".