1118918143 has 18 divisors (see below), whose sum is σ = 1311425336. Its totient is φ = 935177424.

The previous prime is 1118918111. The next prime is 1118918173. The reversal of 1118918143 is 3418198111.

It is a happy number.

It is not a de Polignac number, because 1118918143 - 2⁵ = 1118918111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118918173) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4159413 + ... + 4159681.

Almost surely, 2^1118918143 is an apocalyptic number.

1118918143 is a deficient number, since it is larger than the sum of its proper divisors (192507193).

1118918143 is an frugal number, since it uses more digits than its factorization.

1118918143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 323 counting only the distinct ones).

The product of its digits is 6912, while the sum is 37.

The square root of 1118918143 is about 33450.2338257896. The cubic root of 1118918143 is about 1038.1643355009.

The spelling of 1118918143 in words is "one billion, one hundred eighteen million, nine hundred eighteen thousand, one hundred forty-three".