1118361218 has 54 divisors (see below), whose sum is σ = 1947851451. Its totient is φ = 481263744.

The previous prime is 1118361199. The next prime is 1118361227. The reversal of 1118361218 is 8121638111.

It can be written as a sum of positive squares in 5 ways, for example, as 453391849 + 664969369 = 21293^2 + 25787^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23647.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10451921 + ... + 10452027.

Almost surely, 2^1118361218 is an apocalyptic number.

1118361218 is a deficient number, since it is larger than the sum of its proper divisors (829490233).

1118361218 is a wasteful number, since it uses less digits than its factorization.

1118361218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 139 counting only the distinct ones).

The product of its digits is 2304, while the sum is 32.

The square root of 1118361218 is about 33441.9081094366. The cubic root of 1118361218 is about 1037.9920632546.

Multiplying 1118361218 by its sum of digits (32), we get a square (35787558976 = 189176²).

Adding to 1118361218 its reverse (8121638111), we get a palindrome (9239999329).

The spelling of 1118361218 in words is "one billion, one hundred eighteen million, three hundred sixty-one thousand, two hundred eighteen".