2218118652 has 18 divisors (see below), whose sum is σ = 5606911128. Its totient is φ = 739372872.

The previous prime is 2218118647. The next prime is 2218118711. The reversal of 2218118652 is 2568118122.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 61614407 = 2218118652 / (2 + 2 + 1 + 8 + 1 + 1 + 8 + 6 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30807168 + ... + 30807239.

Almost surely, 2^2218118652 is an apocalyptic number.

It is an amenable number.

2218118652 is an abundant number, since it is smaller than the sum of its proper divisors (3388792476).

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

2218118652 is a wasteful number, since it uses less digits than its factorization.

2218118652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61614417 (or 61614412 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 2218118652 is about 47096.9070322033. The cubic root of 2218118652 is about 1304.1521387411.

The spelling of 2218118652 in words is "two billion, two hundred eighteen million, one hundred eighteen thousand, six hundred fifty-two".