2218135033818 has 48 divisors (see below), whose sum is σ = 5246834104512. Its totient is φ = 671653224000.

The previous prime is 2218135033813. The next prime is 2218135033819. The reversal of 2218135033818 is 8183305318122.

2218135033818 is a `hidden beast` number, since 2 + 21 + 81 + 3 + 503 + 38 + 18 = 666.

It is not an unprimeable number, because it can be changed into a prime (2218135033813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3978678 + ... + 4501793.

It is an arithmetic number, because the mean of its divisors is an integer number (109309043844).

Almost surely, 2^{2218135033818} is an apocalyptic number.

2218135033818 is an abundant number, since it is smaller than the sum of its proper divisors (3028699070694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2218135033818 is a wasteful number, since it uses less digits than its factorization.

2218135033818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481811 (or 8481808 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 2218135033818 in words is "two trillion, two hundred eighteen billion, one hundred thirty-five million, thirty-three thousand, eight hundred eighteen".