12218788918 has 16 divisors (see below), whose sum is σ = 20948002560. Its totient is φ = 5236247016.

The previous prime is 12218788909. The next prime is 12218788927. The reversal of 12218788918 is 81988781221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12218788909) and next prime (12218788927).

It is a super-2 number, since 2×12218788918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269605 + ... + 311647.

It is an arithmetic number, because the mean of its divisors is an integer number (1309250160).

Almost surely, 2^12218788918 is an apocalyptic number.

12218788918 is a deficient number, since it is larger than the sum of its proper divisors (8729213642).

12218788918 is a wasteful number, since it uses less digits than its factorization.

12218788918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62811.

The product of its digits is 1032192, while the sum is 55.

The spelling of 12218788918 in words is "twelve billion, two hundred eighteen million, seven hundred eighty-eight thousand, nine hundred eighteen".