218018389012 has 6 divisors (see below), whose sum is σ = 381532180778. Its totient is φ = 109009194504.

The previous prime is 218018388979. The next prime is 218018389013. The reversal of 218018389012 is 210983810812.

It is a happy number.

218018389012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 218018021776 + 367236 = 466924^2 + 606^2 .

It is a super-2 number, since 2×218018389012² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 218018389012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218018389013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27252298623 + ... + 27252298630.

Almost surely, 2^218018389012 is an apocalyptic number.

It is an amenable number.

218018389012 is a deficient number, since it is larger than the sum of its proper divisors (163513791766).

218018389012 is a wasteful number, since it uses less digits than its factorization.

218018389012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54504597257 (or 54504597255 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 218018389012 in words is "two hundred eighteen billion, eighteen million, three hundred eighty-nine thousand, twelve".