11131110018 has 32 divisors (see below), whose sum is σ = 28269486720. Its totient is φ = 3180317040.

The previous prime is 11131109947. The next prime is 11131110019. The reversal of 11131110018 is 81001113111.

It is a super-2 number, since 2×11131110018² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11131110019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14723313 + ... + 14724068.

It is an arithmetic number, because the mean of its divisors is an integer number (883421460).

Almost surely, 2^11131110018 is an apocalyptic number.

11131110018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11131110018 is an abundant number, since it is smaller than the sum of its proper divisors (17138376702).

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

11131110018 is a wasteful number, since it uses less digits than its factorization.

11131110018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29447399 (or 29447393 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 11131110018 its reverse (81001113111), we get a palindrome (92132223129).

The spelling of 11131110018 in words is "eleven billion, one hundred thirty-one million, one hundred ten thousand, eighteen".