18011000111 has 8 divisors (see below), whose sum is σ = 19417859664. Its totient is φ = 16607197440.

The previous prime is 18011000107. The next prime is 18011000129. The reversal of 18011000111 is 11100011081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18011000111 - 2² = 18011000107 is a prime.

It is a super-2 number, since 2×18011000111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18011000131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751970 + ... + 775551.

It is an arithmetic number, because the mean of its divisors is an integer number (2427232458).

Almost surely, 2^18011000111 is an apocalyptic number.

18011000111 is a deficient number, since it is larger than the sum of its proper divisors (1406859553).

18011000111 is a wasteful number, since it uses less digits than its factorization.

18011000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528441.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 18011000111 its reverse (11100011081), we get a palindrome (29111011192).

The spelling of 18011000111 in words is "eighteen billion, eleven million, one hundred eleven", and thus it is an aban number.